The above contents are followed by past year papers and their mark schemes to help further your
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PMT
Cambridge IGCSE™
PHYSICS
0625/22
Paper 2 Multiple Choice (Extended)
February/March 2022
45 minutes
You must answer on the multiple choice answer sheet.
*0532883419*
You will need: Multiple choice answer sheet
Soft clean eraser
Soft pencil (type B or HB is recommended)
INSTRUCTIONS
 There are forty questions on this paper. Answer all questions.
 For each question there are four possible answers A, B, C and D. Choose the one you consider correct
and record your choice in soft pencil on the multiple choice answer sheet.
 Follow the instructions on the multiple choice answer sheet.
 Write in soft pencil.
 Write your name, centre number and candidate number on the multiple choice answer sheet in the
spaces provided unless this has been done for you.
 Do not use correction fluid.
 Do not write on any bar codes.
 You may use a calculator.
 Take the weight of 1.0 kg to be 10 N (acceleration of free fall = 10 m / s2).
INFORMATION
 The total mark for this paper is 40.
 Each correct answer will score one mark.
 Any rough working should be done on this question paper.
This document has 16 pages.
IB22 03_0625_22/3RP
© UCLES 2022
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2
1
A student investigates a pendulum.
He measures the time for the pendulum to complete 20 oscillations.
He repeats the experiment three more times.
The readings are shown.
experiment
time for
20 oscillations / s
1
17.6
2
19.8
3
17.6
4
18.6
What is the average period of the pendulum?
A
2
0.88 s
B
0.92 s
C
17.6 s
D
18.4 s
A tennis ball falls from the upstairs window of a house.
What can be said about the acceleration of the ball if air resistance is ignored?
3
A
It depends on the density of the ball.
B
It depends on the mass of the ball.
C
It increases as the ball falls.
D
It stays the same as the ball falls.
A car joins a road at a speed of 14 m / s and accelerates at 4.0 m / s2 for 5.0 seconds.
What is the final speed of the car?
A
18 m / s
© UCLES 2022
B
20 m / s
C
32 m / s
0625/22/F/M/22
D
34 m / s
PMT
3
4
The gravitational field strength is 8.8 N / kg on Venus and 3.8 N / kg on Mars.
An object has a weight of 42 N on Venus.
What are the mass and the weight of the object on Mars?
5
mass / kg
weight / N
A
4.8
18
B
4.8
42
C
11
42
D
11
97
A student carries out an experiment to find the density of a rock.
measuring
cylinder
liquid
rock
200 g
balance
264 g
Which two measurements does the student need to make to determine the density of the rock?
6
measurement 1
measurement 2
A
increase in mass
increase in volume of liquid
B
final mass
increase in depth of liquid
C
increase in mass
increase in depth of liquid
D
final mass
increase in volume of liquid
A car has a mass of 1500 kg. A constant resultant force acts on the car and the car accelerates
from 15 m / s to 20 m / s in 4.0 seconds.
What is the magnitude of the resultant force acting on the car?
A
300 N
© UCLES 2022
B
1200 N
C
1900 N
0625/22/F/M/22
D
7500 N
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4
7
A metal wire is loaded up to the limit of proportionality.
Which statement is correct?
8
A
Hooke’s law is not obeyed when the load is increased from zero to this point.
B
When the load is increased beyond the limit of proportionality, the diameter of the wire will
increase.
C
When the load is removed, the wire returns to its original length.
D
Up to the limit of proportionality, there is no change in the shape of the wire.
The diagram shows a uniform metre rule, MN, pivoted at its midpoint P.
M
P
W1
N
W2
Two weights, W1 and W2, are hung either side of the pivot.
The rule remains balanced.
Which row is correct?
9
direction of resultant
moment about point M
direction of resultant
force on the rule
A
clockwise
downwards
B
clockwise
zero
C
zero
downwards
D
zero
zero
Which physical quantity is a vector?
A
mass
B
density
C
temperature
D
velocity
10 A resultant force of 500 N acts for 10 s on a car of mass 1000 kg. This causes the velocity of the
car to double.
What is the final velocity of the car?
A
5m/s
© UCLES 2022
B
10 m / s
C
20 m / s
0625/22/F/M/22
D
50 m / s
PMT
5
11 A child pushes a toy car along a horizontal surface and then releases it.
As the car slows down, what is the main energy transfer?
A
from chemical to thermal
B
from chemical to kinetic
C
from kinetic to gravitational (potential)
D
from kinetic to thermal
12 At time = 0, a cannonball is stationary inside a cannon. The cannonball is then fired from the
cannon.
At time = t, the cannonball moves forwards and the cannon moves backwards.
What happens to the total kinetic energy and the total momentum of the cannon and the
cannonball between time = 0 and time = t ?
total kinetic energy of
cannon and cannonball
total momentum of
cannon and cannonball
A
changes
changes
B
changes
remains the same
C
remains the same
changes
D
remains the same
remains the same
13 In a small hydroelectric power scheme, 800 kg of water drops through a vertical height of 2.2 m
every second. The electrical output is 10.6 kW.
What is the efficiency of the scheme?
A
0.60%
B
17%
C
60%
D
75%
14 An object is at rest on a horizontal surface.
Which equation is used to calculate the pressure that the object exerts?
A
mass of the object
area of contact
B
weight of the object
area of contact
C
mass of the object  area of contact
D
weight of the object  area of contact
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6
15 Smoke particles, illuminated by a bright lamp, are seen through a microscope. They move about
randomly.
What causes this motion?
A
attraction between the smoke particles and the molecules of the air
B
collisions between the smoke particles and the molecules of the air
C
evaporation of the faster-moving smoke particles
D
warming of the smoke particles by the lamp
16 Ether is a liquid that evaporates easily at room temperature.
The rate at which ether evaporates can be increased by bubbling air through it.
The diagram shows this process.
air
air bubbles
ether
Students give three suggestions why the rate of evaporation increases when air is bubbled
through.
Student 1 suggests that the temperature of the ether is decreased.
Student 2 suggests that the surface area of the ether is increased.
Student 3 suggests that evaporated molecules are removed at a greater rate.
Which students are correct?
A
1 and 2
© UCLES 2022
B
1 and 3
C
2 and 3
0625/22/F/M/22
D
3 only
PMT
7
17 Some ice is slowly heated and its temperature is measured. A graph is plotted of temperature
against time.
100
temperature / qC
X
0
–10
time
Which row describes what happens to the thermal energy and to the temperature in section X?
thermal energy
temperature of ice
A
gained by ice
rises
B
gained by ice
stays the same
C
not gained by ice
rises
D
not gained by ice
stays the same
18 The diagram shows the apparatus needed for an experiment to determine the specific heat
capacity of the material from which an object is made.
thermometer
A
heater
object
stop-clock
V
balance
Which piece of apparatus could be omitted if the purpose of the experiment is to determine the
thermal capacity of the object?
A
ammeter
B
balance
C
stop-clock
D
thermometer
© UCLES 2022
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8
19 Both boiling and evaporation involve a change of state from liquid to gas.
Which row gives the correct difference between boiling and evaporation?
boiling
evaporation
A
no bubbles are formed
bubbles are formed
B
occurs at all temperatures
occurs at a definite temperature
C
occurs throughout the liquid
occurs at the surface only
D
the temperature falls
the temperature remains constant
20 Which statement describes thermal conduction in a metal by electrons?
A
Atoms and electrons move freely throughout the metal.
B
Atoms and electrons vibrate about their fixed positions only.
C
Electrons move freely throughout the metal.
D
Electrons remain attached to atoms.
21 A tank contains water. Ripples are produced on the surface of the water. Refraction is observed.
What causes the ripples to refract?
A
The cold water in the tank is replaced by warm water.
B
The ripples change speed as they move from deep to shallow water.
C
The ripples hit the wall of the tank.
D
The ripples pass through a narrow gap.
22 The diagram shows wavefronts of a water wave passing through a gap in a barrier.
barrier
Which change will increase the diffraction of the wave as it passes through the gap?
A
Increase the amplitude of the wave.
B
Increase the width of the gap.
C
Reduce the depth of water.
D
Reduce the frequency of the wave.
© UCLES 2022
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PMT
9
23 The diagrams each show a ray of light from an object O passing through a thin converging lens.
The principal focuses in each diagram are labelled F.
1
2
O
O
F
F
F
F
3
O
F
F
Which diagrams are correct?
A
1 and 2
B
2 only
C
1 and 3
D
3 only
24 The diagram shows a ray of light inside an optical fibre approaching point X.
normal to the
surface at X
tangent to the
surface at X
X
P
Q
The light is totally reflected within the fibre.
The refractive index of the material of the optical fibre is 1.39.
Which condition ensures that total internal reflection occurs?
A
Q < 45
© UCLES 2022
B
Q > 47
C
P > 47
0625/22/F/M/22
D
P=Q
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10
25 An eclipse of the Sun happens when the Moon comes between the Earth and the Sun.
Which statement is correct?
A
Infrared radiation from the Sun disappears before visible light and ultraviolet radiation.
B
Ultraviolet radiation from the Sun disappears before visible light and infrared radiation.
C
Visible light from the Sun disappears before ultraviolet radiation and infrared radiation.
D
Infrared radiation, ultraviolet radiation and visible light from the Sun all disappear at the same
moment.
26 The diagram shows air particles in a sound wave.
V
W
X
Y
Z
Which row correctly identifies the position of a compression and position of a rarefaction?
compression
rarefaction
A
X
Y
B
Y
X
C
V
Z
D
Z
V
27 Two isolated metal spheres are both negatively charged. The spheres are brought close together
but do not touch.
Which diagram shows the charge distribution on the spheres?
B
A
–
–
–
–
–
–
–
–
–
C
–
–
–
–
–
–
D
–
–
–
–
–
–
–
–
–
28 Two separate circuits have different power supplies. Both power supplies provide the same
magnitude current.
Power supply P has an electromotive force (e.m.f.) of 1.5 V and power supply Q has an e.m.f. of
3.0 V.
Which statements about Q are correct when compared with P?
A
1
Q supplies twice the charge per unit time.
2
Q supplies twice the energy per unit charge.
3
Q supplies twice the energy per unit time.
1, 2 and 3
© UCLES 2022
B
1 and 2 only
C
1 and 3 only
0625/22/F/M/22
D
2 and 3 only
PMT
11
29 The diagram shows a piece of metal resistance wire.
Which wire, made of the same metal, has a smaller resistance?
A
a wire of the same length with a larger diameter
B
a wire of the same length with a smaller diameter
C
a wire of greater length with the same diameter
D
a wire of greater length with a smaller diameter
30 Which labelled component in the circuit shown controls the brightness of lamp X?
A
V
X
B
C
D
31 A circuit includes a battery, two identical resistors and five ammeters, P, Q, R, S and T.
P
Q
A
A
R
A
S
T
A
A
Which statement about the readings on the ammeters is not correct?
A
P has a greater reading than Q.
B
P has a greater reading than R.
C
P has a greater reading than S.
D
P has a greater reading than T.
© UCLES 2022
0625/22/F/M/22
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12
32 An electrician sets up a potential divider circuit in a fridge so that when the fridge door is open
and light from the room enters the fridge, a warning light turns on.
Which component does the electrician need to use in addition to a variable resistor?
A
light-dependent resistor
B
relay
C
thermistor
D
variable resistor
33 Two NAND gates are joined together as shown.
input 1
output
input 2
Which single logic gate is equivalent to this combination?
A
AND
© UCLES 2022
B
NAND
C
NOR
0625/22/F/M/22
D
OR
PMT
13
34 The diagram shows an electric drill and safety guard.
electric motor
safety guard in
closed position
drill
The drill requires the logic circuit shown.
starting switch
on
1
A
off
0
motor
motor on 1
motor off 0
alarm
alarm on 1
alarm off 0
safety guard
open 0
B
closed 1
?
The circuit must only allow the motor to start when the safety guard is closed. If the safety guard
is not closed when the starting switch is on, the alarm must sound.
Which logic gate is missing from the circuit?
A
NOT
B
NAND
C
AND
D
NOR
35 Two magnets are placed near a current-carrying coil.
The diagram shows this experimental arrangement and the current direction in the coil.
X
N
Y
S
N
S
Which statement is correct?
A
Both X and Y are attracted to the coil.
B
Both X and Y are repelled by the coil.
C
X is attracted to the coil and Y is repelled.
D
X is repelled by the coil and Y is attracted.
© UCLES 2022
0625/22/F/M/22
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14
36 Two circuits are set up as shown. The iron rods are placed close together and are able to move.
S
iron rod
X
iron rod
What happens to the size of the gap at X when switch S is closed?
A
It decreases.
B
It decreases then increases.
C
It increases.
D
It does not change.
37 When a current-carrying conductor is placed in a magnetic field, it experiences a force.
Which statement about this force is correct?
A
It is parallel to both the magnetic field and the direction of the current.
B
It is parallel to the magnetic field and perpendicular to the direction of the current.
C
It is perpendicular to the magnetic field and parallel to the direction of the current.
D
It is perpendicular to both the magnetic field and the direction of the current.
© UCLES 2022
0625/22/F/M/22
PMT
15
38 When a beam of -particles is incident on a thin metal foil, most of them follow a path
represented by path X in the diagram. A small number of -particles follow a path represented by
path Y in the diagram.
foil
X
Y
Which row correctly describes a conclusion that can be drawn from each of these observations
about the structure of the atom?
most follow path X
some follow path Y
A
atom is mostly empty space
atom contains something that repels -particles
B
atom is mostly empty space
nucleus contains protons and neutrons
C
atom is neutral
atom contains something that repels -particles
D
atom is neutral
nucleus contains protons and neutrons
39 Nuclear fusion is a reaction that takes place in stars.
Which row describes this reaction?
action of atomic nuclei
energy
A
an atomic nucleus splits into
two or more smaller nuclei
absorbed
B
an atomic nucleus splits into
two or more smaller nuclei
released
C
atomic nuclei join together
to form a larger nucleus
absorbed
D
atomic nuclei join together
to form a larger nucleus
released
© UCLES 2022
0625/22/F/M/22
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16
40 When a radioactive isotope is set up close to a counter, a count rate of 38 000 counts / s is
obtained. The table shows the count rate from the isotope over a three-year period.
time / years
count rate
counts / s
0
38 000
1
26 000
2
17 000
3
12 000
What is the half-life of the isotope?
A
less than 1 year
B
more than 1 year but less than 2 years
C
more than 2 years but less than 3 years
D
more than 3 years
Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every
reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the
publisher will be pleased to make amends at the earliest possible opportunity.
To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the Cambridge
Assessment International Education Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download
at www.cambridgeinternational.org after the live examination series.
Cambridge Assessment International Education is part of Cambridge Assessment. Cambridge Assessment is the brand name of the University of Cambridge
Local Examinations Syndicate (UCLES), which is a department of the University of Cambridge.
© UCLES 2022
0625/22/F/M/22
PMT
Cambridge IGCSE™
PHYSICS
0625/22
Paper 2 Multiple Choice (Extended)
February/March 2022
MARK SCHEME
Maximum Mark: 40
Published
This mark scheme is published as an aid to teachers and candidates, to indicate the requirements of the
examination.
Mark schemes should be read in conjunction with the question paper and the Principal Examiner Report for
Teachers.
Cambridge International will not enter into discussions about these mark schemes.
Cambridge International is publishing the mark schemes for the February/March 2022 series for most
Cambridge IGCSE™, Cambridge International A and AS Level components and some Cambridge O Level
components.
This document consists of 3 printed pages.
© UCLES 2022
[Turn over
PMT
0625/22
Cambridge IGCSE – Mark Scheme
PUBLISHED
Question
Answer
February/March 2022
Marks
1
B
1
2
D
1
3
D
1
4
A
1
5
A
1
6
C
1
7
C
1
8
D
1
9
D
1
10
B
1
11
D
1
12
B
1
13
C
1
14
B
1
15
B
1
16
C
1
17
B
1
18
B
1
19
C
1
20
C
1
21
B
1
22
D
1
23
C
1
24
B
1
25
D
1
26
A
1
27
D
1
28
D
1
© UCLES 2022
Page 2 of 3
PMT
0625/22
Cambridge IGCSE – Mark Scheme
PUBLISHED
Question
Answer
February/March 2022
Marks
29
A
1
30
B
1
31
A
1
32
A
1
33
A
1
34
C
1
35
B
1
36
C
1
37
D
1
38
A
1
39
D
1
40
B
1
© UCLES 2022
Page 3 of 3
Cambridge IGCSE™
PHYSICS0625/02
For examination from 2023
Paper 2 Multiple Choice (Extended)
45 minutes
SPECIMEN PAPER
You must answer on the multiple choice answer sheet.
*0123456789*
You will need:
Multiple choice answer sheet
Soft clean eraser
Soft pencil (type B or HB is recommended)
INSTRUCTIONS
●
There are forty questions on this paper. Answer all questions.
●
For each question there are four possible answers A, B, C and D. Choose the one you consider correct
and record your choice in soft pencil on the multiple choice answer sheet.
●
Follow the instructions on the multiple choice answer sheet.
●
Write in soft pencil.
●
Write your name, centre number and candidate number on the multiple choice answer sheet in the
spaces provided unless this has been done for you.
●
Do not use correction fluid.
●
Do not write on any bar codes.
●
You may use a calculator.
●
Take the weight of 1.0 kg to be 9.8 N (acceleration of free fall = 9.8 m / s2).
INFORMATION
●
The total mark for this paper is 40.
●
Each correct answer will score one mark.
●
Any rough working should be done on this question paper.
This document has 14 pages.
© UCLES 2020
[Turn over
2
1
A length of string is measured between two points on a ruler.
string
0
cm
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
When the length of string is wound closely around a pen, it goes round six times.
six turns of string
pen
What is the distance once round the pen?
A
2
3
B
2.2 cm
C
2.6 cm
D
13.2 cm
15.6 cm
When does an object falling vertically through the air reach terminal velocity?
A
when the acceleration of the object becomes negative
B
when the acceleration of the object is equal to g
C
when the air resistance equals the weight of the object
D
when the air resistance is greater than the weight of the object
An athlete runs a 100 m race in a straight line. The table shows how his speed changes with time
for the first 5.0 s of the race.
speed m / s
0
1.7
4.1
5.7
6.5
6.8
time / s
0
1.0
2.0
3.0
4.0
5.0
What is the average acceleration of the athlete between time 2.0 s and time 3.0 s?
A
4
1.6 m / s2
B
1.9 m / s2
C
4.9 m / s2
D
5.7 m / s2
D
740 N
The gravitational field strength on the Moon is 1.6 N / kg.
An astronaut has a mass of 75 kg.
What is the weight of the astronaut on the Moon?
A
47 N
© UCLES 2020
B
75 N
C
120 N
0625/02/SP/23
3
5
Two objects P and Q are placed in a beaker containing a liquid.
Object P floats in the liquid and object Q sinks.
Which row for the densities of object P, object Q and the liquid is possible?
6
density of object P
g / cm3
density of object Q
g / cm3
density of liquid
g / cm3
A
1.2
0.6
0.8
B
1.2
1.4
1.0
C
11.3
8.9
13.6
D
11.3
19.3
13.6
A ball of mass 0.12 kg is hit by a tennis player.
The velocity of the ball changes from 0 m / s to 5.0 m / s in 0.60 s.
What is the average resultant force acting on the ball while it is being hit?
A
7
1.0 N
B
C
2.5 N
D
3.6 N
8.3 N
A balloon and a mass are attached to a rod that is pivoted at a fixed point P.
balloon
45
40
35
30
25
20
cm
15
10
5
P
mass
The balloon is filled with helium, which is a gas that is less dense than air.
The balloon filled with helium applies an upward force on the rod.
The rod is horizontal and in equilibrium.
Which action causes the rod to rotate clockwise?
A
moving the balloon to the 40 cm mark and the mass to the 30 cm mark
B
moving the balloon to the 20 cm mark and the mass to the 10 cm mark
C
moving the balloon to the 25 cm mark and the mass to the 25 cm mark
D
moving the balloon to the 20 cm mark and the mass to the 30 cm mark
© UCLES 2020
0625/02/SP/23
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4
8
A hole is made in a square tile of uniform thickness. The diagram shows the tile hanging loosely
on a nail.
Where is the centre of gravity of the tile?
A
nail through hole
tile
D
C
9
B
An object of mass 0.16 kg is moving forwards at a speed of 0.50 m / s.
A second object of mass 0.10 kg is at rest.
The first object strikes the second object.
After the collision, the second object moves forwards at a speed of 0.50 m / s.
What is the speed of the first object after the collision?
A
0.0 m / s
B
0.19 m / s
C
0.31 m / s
D
0.50 m / s
10 A ball is at rest at the top of a hill.
The ball rolls down the hill.
At the bottom of the hill the ball hits a wall and stops.
Which energy changes occur?
A
gravitational potential energy → internal energy → kinetic energy
B
gravitational potential energy → kinetic energy → internal energy
C
kinetic energy → gravitational potential energy → internal energy
D
kinetic energy → internal energy → gravitational potential energy
© UCLES 2020
0625/02/SP/23
5
11
A man climbs a ladder.
Which quantities can be used to calculate the useful power of the man?
A
the weight of the man and the time taken only
B
the weight of the man and the vertical distance moved only
C
the work done by the man and the time taken only
D
the work done by the man and the vertical distance moved only
12 A student uses her thumb to push a drawing pin (thumb tack) into a notice board.
The pin goes into the board but does not penetrate her thumb.
Which statement explains this?
A
The force exerted by the pin on her thumb is greater than the force exerted by the pin on the
notice board.
B
The force exerted by the pin on the notice board is greater than the force exerted by the pin
on her thumb.
C
The pressure of the pin on her thumb is greater than the pressure of the pin on the notice
board.
D
The pressure of the pin on the notice board is greater than the pressure of the pin on her
thumb.
13 A submarine is a boat that can travel below the surface of the sea.
A submarine is 20 m below the surface of the sea. The pressure due to the sea water at this
depth is P.
On another day, the submarine is 26 m below the surface of fresh water.
The density of sea water is 1.3 times the density of fresh water.
What is the pressure due to the fresh water at a depth of 26 m?
A
P
1.3
B
P
C
1.3 P
D
1.7 P
14 When particles of a gas collide with a wall of a container, the wall experiences a pressure.
What is the cause of this pressure?
A
the change in energy of the particles
B
the change in momentum of the particles
C
the change in power of the particles
D
the change in speed of the particles
© UCLES 2020
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6
15 A substance can exist in three different states: solid, liquid or gas.
Each of the two statements below describes a change of state.
change 1: Particles move much closer together but continue to travel throughout the substance.
change 2: Particles stop travelling throughout the substance and just vibrate about fixed positions.
Which changes of state do these statements describe?
change 1
change 2
A
condensation
melting
B
condensation
solidification
C
solidification
condensation
D
solidification
melting
16 Copper is a type of metal.
A block of copper has a mass of 2.0 kg.
The block of copper absorbs 12 000 J of thermal energy.
The specific heat capacity of copper is 385 J / (kg °C).
What is the temperature rise of the copper?
A
15.6 °C
B
31.2 °C
C
D
46.8 °C
62.4 °C
17 The diagram shows the gap between a hot surface and a cold surface. The gap can contain air
(gas), iron (solid), a vacuum or water (liquid).
cold
gap
hot
Which material in the gap allows the quickest transfer of thermal energy between the surfaces by
conduction?
A
air (gas)
B
iron (solid)
C
vacuum
D
water (liquid)
© UCLES 2020
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7
18 Which row about boiling and about evaporation is correct?
boiling
evaporation
A
takes place only at the surface
takes place only at the surface
B
takes place only at the surface
takes place throughout the liquid
C
takes place throughout the liquid
takes place only at the surface
D
takes place throughout the liquid
takes place throughout the liquid
19 Light travels at a speed of 2.0 × 108 m / s in a glass block.
In the glass, the wavelength of the light is 4.0 × 10–7 m.
What is the frequency of the light?
A
2.0 × 10–15 Hz
B
1.3 × 10–2 Hz
C
80 Hz
D
5.0 × 1014 Hz
20 In a shallow tank, a water wave moves through a barrier with a narrow gap. The diagram shows
the waves on the left-hand side and the right-hand side of the barrier.
water
wave
Which term describes the effect shown?
A
reflection
B
dispersion
C
refraction
D
diffraction
© UCLES 2020
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8
21 Which statement describes monochromatic light?
A
light that never diffracts
B
light that has a single frequency
C
light that spreads out when shone through a glass prism
D
light that travels at the same speed in all materials
22 An object is placed 8.0 cm from a thin converging lens of focal length 5.0 cm.
converging lens
object
F
5.0 cm
8.0 cm
Which statement about the image formed by the lens is correct?
A
The image is real and inverted.
B
The image is real and upright.
C
The image is virtual and inverted.
D
The image is virtual and upright.
23 A ray of light travels through transparent plastic to air.
transparent plastic
air
NOT TO
SCALE
The ray of light enters the air travelling parallel to the surface of the plastic.
The refractive index of the plastic is 1.25.
What is angle θ ?
A
37°
© UCLES 2020
B
39°
C
51°
0625/02/SP/23
D
53°
9
24 What is the speed of electromagnetic waves in a vacuum?
A
3.0 × 104 cm / s
B
3.0 × 105 km / s
C
3.0 × 106 cm / s
D
3.0 × 1011 km / s
25 A pulse of sound is produced at the bottom of a boat. The sound travels through the water and is
reflected from the sea bed. The sound reaches the boat again after 1.3 s. The sea bed is 1000 m
below the boat.
boat
1000 m
sea bed
Using this information, what is the speed of sound in the water?
A
770 m / s
B
1300 m / s
C
1500 m / s
D
2600 m / s
26 A sheet of ice floats on water. A source of sound S is positioned at the edge of the ice sheet.
Four microphones are placed equal distances from S.
Which microphone detects the sound from S first?
A
air
D
B
S
water
ice
C
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27 The diagram shows a bar magnet and four plotting compasses.
Which compass correctly shows the direction of the magnetic field due to the magnet?
A
D
S
N
B
C
28 A plastic rod is rubbed with a cloth. The rod becomes positively charged.
What happens to the plastic rod and what is the charge on the cloth?
plastic rod
charge on cloth
A
gains electrons
negative
B
gains electrons
positive
C
loses electrons
negative
D
loses electrons
positive
29 The electromotive force (e.m.f.) of a mobile phone battery is 3.7 V.
What does this mean?
A
3.7 J is the maximum energy the battery can provide in 1.0 s.
B
3.7 J is the total energy the battery can provide before it has to be recharged.
C
3.7 J of energy is provided by the battery to drive a charge of 1.0 C around a complete circuit.
D
3.7 J of energy is provided by the battery to drive a current of 1.0 A around a complete circuit.
© UCLES 2020
0625/02/SP/23
11
30 A computer engineer wants the speed of a fan to increase when the temperature inside a computer
increases. The engineer knows that a larger current causes the fan to turn more quickly.
fan motor
power
supply
M
X
computer
Which component should be placed at X to make this happen?
A
a relay
B
a thermistor
C
a transformer
D
a variable resistor
31 A water heater is connected to a 230 V supply and there is a current of 26 A in the heater.
It takes 20 minutes to heat the water to the required temperature.
How much energy is supplied by the heater?
A
6.0 × 103 J
B
1.0 × 104 J
C
1.2 × 105 J
D
7.2 × 106 J
32 An electric kettle has a metal casing. The cable for the kettle contains a wire that is connected to
the earth pin of the plug.
Which danger does this guard against?
A
the cable to the kettle becoming too hot
B
the casing of the kettle becoming live
C
the casing of the kettle becoming wet on the outside
D
the casing of the kettle overheating
© UCLES 2020
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33 An electric current can produce a heating effect and a magnetic effect.
Which row shows the effect that a relay uses and one application of a relay?
effect used by a relay
one application of a relay
A
heating effect
allowing a small current to switch on a large current
B
heating effect
changing the voltage of an a.c. supply
C
magnetic effect
allowing a small current to switch on a large current
D
magnetic effect
changing the voltage of an a.c. supply
34 The diagram shows a bar magnet and a coil of wire. The bar magnet is moved at the same speed
in each experiment.
In which situation is the largest electromotive force (e.m.f.) induced?
A
moves right
B
stationary
bar magnet
moves left
coil
bar magnet
C
moves right
bar magnet
stationary
coil
D
moves left at same
speed as bar magnet
moves left
coil
moves left at same
speed as bar magnet
bar magnet
35 Increasing the transmission voltage in transmission cables reduces power losses.
What is the explanation for this reduction?
A
The current decreases, reducing thermal energy losses.
B
The current increases, increasing the flow of charge.
C
The resistance of the cable increases, reducing the current.
D
The resistance of the cable decreases.
© UCLES 2020
0625/02/SP/23
coil
13
36 There is an electric current in a straight wire in the direction into the page. This produces a
magnetic field around the wire.
All the field lines are circles but only one field line is shown.
magnetic field line
wire with current
into the page
Which row describes the magnetic field?
direction of the field lines
spacing of the field lines
A
anti-clockwise
equally spaced over the whole field
B
anti-clockwise
more widely spaced further from the wire
C
clockwise
equally spaced over the whole field
D
clockwise
more widely spaced further from the wire
37 The diagram shows emissions from a source passing into the electric field between two charged
plates.
+ + + + + + + + + +
source
– – – – – – – – – –
What is emitted by this source?
A
neutrons and γ-rays only
B
α-particles and β-particles only
C
α-particles and γ-rays only
D
β-particles and γ-rays only
© UCLES 2020
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38 Which row in the table describes the process of nuclear fusion and identifies the change in
total mass of the particles involved?
process
change in total mass of the particles
A
a large nucleus splits into two smaller nuclei
decreases
B
a large nucleus splits into two smaller nuclei
increases
C
two small nuclei combine to form a larger nucleus
decreases
D
two small nuclei combine to form a larger nucleus
increases
39 The orbit of the Moon around the Earth is modelled as a circular path of radius 3.8 × 105 km.
The orbital period is 29.5 days (710 hours).
What is the orbital speed of the Moon?
A
5.4 × 102 km / h
B
1.1 × 103 km / h
C
1.7 × 103 km / h
D
3.4 × 103 km / h
40 Which statement does not describe redshift?
A
All the light emitted from all distant galaxies is at the red end of the spectrum.
B
The light arriving at the Earth from a receding star is always redshifted.
C
During redshift, the wavelength of the observed light is longer than it is if the redshift had not
occurred.
D
The light from stars in all distant galaxies is moved towards the red end of the spectrum.
Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every
reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the
publisher will be pleased to make amends at the earliest possible opportunity.
Cambridge Assessment International Education is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of the University of
Cambridge Local Examinations Syndicate (UCLES), which itself is a department of the University of Cambridge.
© UCLES 2020
0625/02/SP/23
Cambridge IGCSE™
0625/02
PHYSICS
For examination from 2023
Paper 2 Multiple Choice (Extended)
MARK SCHEME
Maximum Mark: 40
Specimen
This document has 4 pages. Any blank pages are indicated.
© UCLES 2020
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0625/02
Cambridge IGCSE – Mark Scheme
SPECIMEN
Question
Answer
For examination
from 2023
Marks
1
A
1
2
C
1
3
A
1
4
C
1
5
D
1
6
A
1
7
B
1
8
D
1
9
B
1
10
B
1
11
C
1
12
D
1
13
B
1
14
B
1
15
B
1
16
A
1
17
B
1
18
C
1
19
D
1
20
D
1
21
B
1
22
A
1
23
D
1
24
B
1
25
C
1
26
B
1
27
D
1
28
C
1
29
C
1
30
B
1
31
D
1
32
B
1
33
C
1
34
C
1
35
A
1
36
D
1
© UCLES 2020
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0625/02
Cambridge IGCSE – Mark Scheme
SPECIMEN
Question
Answer
For examination
from 2023
Marks
37
C
1
38
C
1
39
D
1
40
A
1
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Cambridge IGCSE – Mark Scheme
SPECIMEN
BLANK PAGE
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For examination
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Cambridge IGCSE™
*0123456789*
PHYSICS0625/04
Paper 4 Theory (Extended)
For examination from 2023
1 hour 15 minutes
SPECIMEN PAPER
You must answer on the question paper.
No additional materials are needed.
INSTRUCTIONS
●
Answer all questions.
●
Use a black or dark blue pen. You may use an HB pencil for any diagrams or graphs.
●
Write your name, centre number and candidate number in the boxes at the top of the page.
●
Write your answer to each question in the space provided.
●
Do not use an erasable pen or correction fluid.
●
Do not write on any bar codes.
●
You may use a calculator.
●
You should show all your working and use appropriate units.
●
Take the weight of 1.0 kg to be 9.8 N (acceleration of free fall = 9.8 m / s2).
INFORMATION
●
The total mark for this paper is 80.
●
The number of marks for each question or part question is shown in brackets [ ].
This document has 16 pages. Any blank pages are indicated.
© UCLES 2020
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2
1
Fig. 1.1 shows the speed-time graph for a vehicle accelerating from rest.
30
speed 25
m/s
20
15
10
5
0
0
20
40
60
80
100 120 140 160
time / s
Fig. 1.1
(a) Calculate the acceleration of the vehicle at time t = 30 s.
acceleration = ........................................................... [3]
(b) Without further calculation, state how the acceleration at time t = 100 s compares to the
acceleration at time t = 10 s.
Using ideas about forces, explain why any change in the acceleration has occurred.
....................................................................................................................................................
....................................................................................................................................................
............................................................................................................................................... [2]
(c) Determine the distance travelled by the vehicle between time t = 120 s and time t = 160 s.
distance = ........................................................... [3]
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[Total: 8]
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3
2
(a) Complete the definitions by giving the name of each quantity.
mass × acceleration = ........................................................
force × time = ........................................................
[2]
(b) Fig. 2.2 shows a man using a golf club to hit a ball.
golf club
ball
Fig. 2.2
The ball has a mass of 0.046 kg. The golf club is in contact with the ball for a duration of
5.0 × 10–4 s and the ball leaves the golf club at a speed of 65 m / s.
(i)
Calculate the momentum of the ball as it leaves the golf club.
momentum = ........................................................... [2]
(ii)
Calculate the average resultant force acting on the ball while it is in contact with the golf
club.
average force = ........................................................... [2]
(iii)
While the golf club is in contact with the ball, the ball becomes compressed and changes
shape.
State the type of energy stored in the ball during its contact with the golf club.
....................................................................................................................................... [1]
© UCLES 2020
[Total: 7]
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4
3
Fig. 3.1 shows solar cells that use radiation from the Sun to generate electrical power.
Fig. 3.1
(a) (i)
State the name of the process which releases energy in the Sun.
....................................................................................................................................... [1]
(ii)
Describe what happens in this process.
............................................................................................................................................
............................................................................................................................................
....................................................................................................................................... [2]
(b) Apart from solar cells, there are other energy resources used on Earth for which the radiation
from the Sun is the main source.
State the name of one of these energy resources and explain whether it is renewable.
name of energy resource ...........................................................................................................
explanation ................................................................................................................................
....................................................................................................................................................
[2]
(c) State two advantages and two disadvantages of using solar cells to generate electrical
power.
advantage 1 ...............................................................................................................................
....................................................................................................................................................
advantage 2 ...............................................................................................................................
....................................................................................................................................................
disadvantage 1 ..........................................................................................................................
....................................................................................................................................................
disadvantage 2 ..........................................................................................................................
....................................................................................................................................................
[4]
© UCLES 2020
[Total: 9]
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5
4
Fig. 4.1 shows a balloon filled with helium that is used to lift measuring instruments to a great
height above the Earth’s surface.
Fig. 4.1
(a) Using ideas about momentum, explain how the atoms of helium produce a force on the wall
of the balloon.
....................................................................................................................................................
....................................................................................................................................................
....................................................................................................................................................
............................................................................................................................................... [3]
(b) At ground level, the pressure of the helium in the balloon is 1.0 × 105 Pa. The volume of the
helium is 9.6 m3.
The balloon is released and it rises quickly through the atmosphere. The volume of the helium
increases. The temperature of the helium remains constant.
(i) Explain why the pressure in the balloon decreases as the balloon rises.
You should refer to helium atoms in your answer.
............................................................................................................................................
............................................................................................................................................
....................................................................................................................................... [2]
(ii)
Calculate the pressure of the helium when its volume is 12 m3.
pressure = ........................................................... [2]
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[Total: 7]
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6
5
(a) Compare the arrangement and motion of the particles in ice and in liquid water.
arrangement ..............................................................................................................................
....................................................................................................................................................
motion ........................................................................................................................................
....................................................................................................................................................
[2]
(b) A lake has a layer of ice on its surface. The area of the lake is 1800 m2. The ice has a
thickness of 0.025 m. The density of ice is 920 kg / m3.
(i)
Calculate the mass of ice on the lake.
mass = ........................................................... [2]
(ii) At night, the temperature of the ice on the lake falls by 3.5 °C.
The specific heat capacity of ice is 2.1 × 103 J / kg °C.
Calculate the change in energy as the temperature falls.
energy = ........................................................ J [2]
© UCLES 2020
[Total: 6]
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7
BLANK PAGE
© UCLES 2020
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8
6
(a) Fig. 6.1 shows a converging lens and its principal axis. The points F1 and F2 are each a
principal focus of the lens.
O
principal axis
F1
F2
Fig. 6.1
An object O is placed between F1 and the lens.
(i) On Fig. 6.1, draw two rays from the top of the object O to locate the image.
Label the image I. (ii)
[3]
The object O is moved to the left along the principal axis so that it is further from the lens
than F1.
Fig. 6.2 is a diagram of the new arrangement with the new image shown.
O
F1
F2
principal axis
image
Fig. 6.2
Underline three of the terms below that describe the image shown in Fig. 6.2.
© UCLES 2020
diminished
enlarged
inverted
real
0625/04/SP/23
same size
upright
virtual
[2]
9
(b) Fig. 6.3 shows yellow light passing through a glass prism.
Fig. 6.3
Blue light enters the prism along the same path as the yellow light.
On Fig. 6.3, draw the path of the blue light as it enters, passes through and leaves the prism.
[2]
© UCLES 2020
[Total: 7]
0625/04/SP/23
[Turn over
10
7
(a) State a typical value for the speed of sound in air.
speed = ........................................................... [1]
(b) A sound wave in air has a wavelength of 22 mm.
Using your value for the speed of sound in (a), calculate the frequency of the sound wave.
frequency = ........................................................... [2]
(c) Fig. 7.1 shows a solid block made from hot liquid metal. As the liquid cooled, a bubble formed
inside the block. The bubble is not visible from outside the block.
bubble inside
metal block
metal
block
Fig. 7.1
Describe and explain how to use ultrasound to determine the size and position of the bubble
inside the metal block. You may draw on the diagram.
....................................................................................................................................................
....................................................................................................................................................
....................................................................................................................................................
....................................................................................................................................................
....................................................................................................................................................
....................................................................................................................................................
............................................................................................................................................... [4]
© UCLES 2020
[Total: 7]
0625/04/SP/23
11
8
Fig. 8.1 is a circuit diagram.
24 V
8.0 Y
4.0 Z
6.0 Fig. 8.1
(a) Calculate the combined resistance between Y and Z.
resistance = ........................................................... [4]
(b) Calculate the potential difference (p.d.) across the 8.0 Ω resistor.
p.d. = ........................................................... [2]
© UCLES 2020
[Total: 6]
0625/04/SP/23
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12
9
Fig. 9.1 shows a conducting ball that oscillates between two charged plates.
clamp
insulating
thread
positive plate
negative plate
ball
+
–
very high
voltage supply
sensitive
ammeter
Fig. 9.1
As the ball oscillates, it touches each plate in turn.
(a) Referring to the charge on the ball, explain why the ball moves to the positive plate after
touching the negative plate.
....................................................................................................................................................
....................................................................................................................................................
....................................................................................................................................................
............................................................................................................................................... [2]
(b) State which particles move when there is a current and state the direction in which they move
through the sensitive ammeter.
particles: ....................................................................................................................................
direction: ....................................................................................................................................
[2]
© UCLES 2020
0625/04/SP/23
13
(c) For each complete oscillation of the ball moving between the plates, a charge of 8.5 × 10–10 C
is transferred from one plate to the other. The frequency of oscillation is 4.0 Hz.
Calculate the current shown on the sensitive ammeter.
current = ........................................................... [3]
© UCLES 2020
[Total: 7]
0625/04/SP/23
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14
10 (a) (i)
An americium (Am) nucleus decays by the emission of an α-particle into a neptunium
(Np) nucleus.
Complete the nuclear equation for this decay.
241
Am →
95
[2]
(ii) Americium is used in smoke detectors.
Explain why beta (β) emitters or gamma (γ) emitters are not used in smoke detectors.
............................................................................................................................................
....................................................................................................................................... [1]
(b) The half-life of this americium nuclide is 470 years. A sample of this nuclide contains
8.0 × 1014 atoms. After some time, 6.0 × 1014 americium atoms have decayed.
Calculate the time required for this decay.
time = ........................................................... [3]
© UCLES 2020
[Total: 6]
0625/04/SP/23
15
11
(a) Describe and explain how a stable star is formed.
....................................................................................................................................................
....................................................................................................................................................
....................................................................................................................................................
....................................................................................................................................................
....................................................................................................................................................
............................................................................................................................................... [3]
(b) Describe and explain what can be deduced from cosmic microwave background radiation
(CMBR).
....................................................................................................................................................
....................................................................................................................................................
....................................................................................................................................................
....................................................................................................................................................
....................................................................................................................................................
............................................................................................................................................... [3]
© UCLES 2020
[Total: 6]
0625/04/SP/23
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16
12 Fig. 12.1 shows a transformer.
240 V
mains
8000
turns
Fig. 12.1
There are 8000 turns in the primary coil of the transformer. The primary coil is connected to a
240 V mains supply. A 6.0 V lamp connected to the secondary coil operates at full brightness.
(a) Calculate the number of turns in the secondary coil.
number of turns = ........................................................... [2]
(b) The current in the lamp is 2.0 A. The transformer operates with 100% efficiency.
Calculate the current in the primary circuit.
current = ........................................................... [2]
[Total: 4]
Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every
reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the
publisher will be pleased to make amends at the earliest possible opportunity.
Cambridge Assessment International Education is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of the University of
Cambridge Local Examinations Syndicate (UCLES), which itself is a department of the University of Cambridge.
© UCLES 2020
0625/04/SP/23
Cambridge IGCSE™
0625/04
PHYSICS
For examination from 2023
Paper 4 Theory (Extended)
MARK SCHEME
Maximum Mark: 80
Specimen
This document has 12 pages. Any blank pages are indicated.
© UCLES 2020
[Turn over
Cambridge IGCSE – Mark Scheme
SPECIMEN
For examination
from 2020
the specific content of the mark scheme or the generic level descriptors for the question
the specific skills defined in the mark scheme or in the generic level descriptors for the question
the standard of response required by a candidate as exemplified by the standardisation scripts.
marks are awarded for correct/valid answers, as defined in the mark scheme. However, credit is given for valid answers which go beyond the
scope of the syllabus and mark scheme, referring to your Team Leader as appropriate
marks are awarded when candidates clearly demonstrate what they know and can do
marks are not deducted for errors
marks are not deducted for omissions
answers should only be judged on the quality of spelling, punctuation and grammar when these features are specifically assessed by the
question as indicated by the mark scheme. The meaning, however, should be unambiguous.
© UCLES 2020
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Marks should be awarded using the full range of marks defined in the mark scheme for the question (however; the use of the full mark range may
be limited according to the quality of the candidate responses seen).
GENERIC MARKING PRINCIPLE 5:
Rules must be applied consistently, e.g. in situations where candidates have not followed instructions or in the application of generic level
descriptors.
GENERIC MARKING PRINCIPLE 4:
•
•
•
•
•
Marks must be awarded positively:
GENERIC MARKING PRINCIPLE 3:
Marks awarded are always whole marks (not half marks, or other fractions).
GENERIC MARKING PRINCIPLE 2:
•
•
•
Marks must be awarded in line with:
GENERIC MARKING PRINCIPLE 1:
These general marking principles must be applied by all examiners when marking candidate answers. They should be applied alongside the specific
content of the mark scheme or generic level descriptors for a question. Each question paper and mark scheme will also comply with these marking
principles.
Generic Marking Principles
0625/04
Cambridge IGCSE – Mark Scheme
SPECIMEN
For examination
from 2023
•
•
•
•
•
Page 3 of 12
The response should be read as continuous prose, even when numbered answer spaces are provided.
Any response marked ignore in the mark scheme should not count towards n.
Incorrect responses should not be awarded credit but will still count towards n.
Read the entire response to check for any responses that contradict those that would otherwise be credited. Credit should not be
awarded for any responses that are contradicted within the rest of the response. Where two responses contradict one another, this should
be treated as a single incorrect response.
Non-contradictory responses after the first n responses may be ignored even if they include incorrect science.
For questions that require n responses (e.g. State two reasons …):
‘List rule’ guidance
© UCLES 2020
5
4The error carried forward (ecf) principle should be applied, where appropriate. If an incorrect answer is subsequently used in a scientifically
correct way, the candidate should be awarded these subsequent marking points. Further guidance will be included in the mark scheme where
necessary and any exceptions to this general principle will be noted.
3Although spellings do not have to be correct, spellings of syllabus terms must allow for clear and unambiguous separation from other syllabus
terms with which they may be confused (e.g. ethane / ethene, glucagon / glycogen, refraction / reflection).
2The examiner should not choose between contradictory statements given in the same question part, and credit should not be awarded for any
correct statement that is contradicted within the same question part. Wrong science that is irrelevant to the question should be ignored.
1Examiners should consider the context and scientific use of any keywords when awarding marks. Although keywords may be present, marks
should not be awarded if the keywords are used incorrectly.
Science-Specific Marking Principles
Marks awarded are based solely on the requirements as defined in the mark scheme. Marks should not be awarded with grade thresholds or grade
descriptors in mind.
GENERIC MARKING PRINCIPLE 6:
0625/04
Calculation specific guidance
Cambridge IGCSE – Mark Scheme
SPECIMEN
For examination
from 2020
Guidance for chemical equations
These are compensatory marks which can be awarded even if the points to which they refer are not written down by the candidate,
providing subsequent working gives evidence that they must have known them. For example, if an equation carries a C mark and the
candidate does not write down the actual equation but does correct working which shows the candidate knew the equation, then the C
mark is awarded.
If a correct answer is given to a numerical question, all of the preceding C marks are awarded automatically. It is only necessary to
consider each of the C marks in turn when the numerical answer is not correct.
These are answer marks. They may depend on an M mark or allow a C mark to be awarded by implication.
C marks
A marks
Page 4 of 12
These are method marks upon which A marks later depend. For an M mark to be awarded, the point to which it refers must be seen
specifically in the candidate’s answer. If a candidate is not awarded an M mark, the later A mark cannot be awarded either.
M marks
© UCLES 2020
These are independent marks, which do not depend on other marks. For a B mark to be awarded, the point to which it refers must be
seen specifically in the candidate’s answer.
B marks
Mark categories
State symbols given in an equation should be ignored unless asked for in the question or stated otherwise in the mark scheme.
Multiples / fractions of coefficients used in chemical equations are acceptable unless stated otherwise in the mark scheme.
7
Unless a separate mark is given for a unit, a missing or incorrect unit will normally mean that the final calculation mark is not awarded.
Exceptions to this general principle will be noted in the mark scheme.
For answers given in standard form (e.g. a × 10n) in which the convention of restricting the value of the coefficient (a) to a value between 1 and
10 is not followed, credit may still be awarded if the answer can be converted to the answer given in the mark scheme.
For questions in which the number of significant figures required is not stated, credit should be awarded for correct answers when rounded by
the examiner to the number of significant figures given in the mark scheme. This may not apply to measured values.
Correct answers to calculations should be given full credit even if there is no working or incorrect working, unless the question states ‘show
your working’.
6
0625/04
‘or words to that effect’
‘significant figures’ – answers are normally acceptable to any number of significant figures ⩾ 2. Any exceptions to this general
rule will be specified in the mark scheme.
o.w.t.t.e.
s.f.
© UCLES 2020
Page 5 of 12
Work which has been crossed out and not replaced but can easily be read, should be marked as if it had not been crossed
out.
‘error carried forward’
e.c.f.
Crossed-out work
Indicates that something which is not correct or irrelevant is to be disregarded.
Ignore / Ig
Only accept these where specified in the mark scheme.
A less than ideal answer which should be marked correct.
Accept / Acc
Fractions
Indicates that an incorrect answer is not to be disregarded but cancels another otherwise correct alternative offered by the
candidate for this mark.
NOT / not
If the only error in arriving at a final answer is because given or previously calculated data has clearly been misread but used
correctly, all but the final A mark can be awarded.
Indicates alternative answers, any one of which is satisfactory for scoring the marks.
OR / or
Transcription errors
Statements on both sides of the AND are needed for that mark.
AND / and
If the only error in arriving at a final answer is clearly an arithmetic one, all but the final A mark can be awarded. Regard a
power of ten error as an arithmetic error.
The word or phrase in brackets is not required but sets the context.
(brackets)
Arithmetic errors
Actual word underlined must be used by candidate (grammatical variants accepted).
underline
For examination
from 2023
Alternative answers for the same marking point.
Cambridge IGCSE – Mark Scheme
SPECIMEN
/
Abbreviations and guidance
0625/04
© UCLES 2020
2(b)(iii)
2(b)(ii)
2(b)(i)
2(a)
Question
1(c)
1(b)
1(a)
Question
0625/04
Dt
Dv
OR calculation shown
a=
elastic (energy) OR strain (energy)
6000 N
6000 N
OR
Page 6 of 12
(v − u)
and F = ma or
t
0.046 # 65
or
0.00050
0.046 × 130 000
OR
B1
A1
C1
A1
3.0 kg m / s OR 3.0 N s
m (v − u)
3.0
or
t
0.00050
C1
(p =) mv OR 0.046 × 65
(F =)
B1
impulse
Marks
A1
C1
B1
Answer
1
1
× 40 × 10) OR × (30 + 20) × 40
2
2
force
1000 m
distance = (20 × 40) + (
C1
B1
less driving force OR greater resistive force / friction / air resistance / drag AND resultant force less
area under graph / area under line
B1
A1
C1
C1
Marks
For examination
from 2020
acceleration less / at a slower rate
acceleration in range 0.30 to 0.45 m / s2
α=
mention of gradient of graph at t = 30 s OR tangent drawn at t = 30 s and triangle drawn OR values of t and v taken from
graph
Answer
Cambridge IGCSE – Mark Scheme
SPECIMEN
© UCLES 2020
5(a)
Question
4(b)(ii)
4(b)(i)
4(a)
Question
B1
rate of collision (with walls of balloon) decreases OR fewer collisions per unit area
motion:
Ice: vibrate
Water: move (around) or slide over each other
arrangement:
Ice: in lattice / regular / arranged / orderly / fixed in place
Water: random / irregular / not arranged / not orderly
8.0 × 104 Pa
Page 7 of 12
Answer
B2
Marks
A1
C1
B1
fewer atoms per unit volume OR density of gas less
P1 V1
1.0 # 105 # 9.6
OR
V2
12
A1
force on wall = (total) rate of change of momentum (of atoms)
OR = change of momentum (of atoms) per second
OR = change of momentum (of atoms) / time
PV = constant OR P1V1 = P2V2 OR (P2 =)
C1
(atoms) undergo change of momentum
B2
any two disadvantages from: intermittent supply / unattractive / takes up space / uses land / d.c. output
B1
B2
any two advantages from: no polluting gases / quiet / low maintenance / can be placed on roofs / clean / cheap to run
3(c)
atoms collide with wall (and rebound) OR atoms rebound from wall
A1
renewable OR not (according answer) AND matching explanation
Marks
M1
any suitable resource, e.g. fossil fuels; hydroelectric; wave; wind NOT geothermal, nuclear
Answer
B1
small nuclei to larger nuclei OR hydrogen to helium (in some way) OR loss of mass
3(b)
B1
nuclei combine / join together
3(a)(ii)
B1
Marks
For examination
from 2023
nuclear fusion
Answer
Cambridge IGCSE – Mark Scheme
SPECIMEN
3(a)(i)
Question
0625/04
© UCLES 2020
7(c)
7(b)
7(a)
Question
6(b)
6(a)(ii)
6(a)(i)
Question
5(b)(ii)
5(b)(i)
Question
0625/04
m
B1
B1
B1
(display used to determine) time for echo of pulse to return from front AND back of bubble
use of speed of sound in the metal
use of distance = speed × time to calculate position and size
Page 8 of 12
B1
A1
C1
B1
use of transducer to send and receive pulses of ultrasound
Correct answer: e.g. 330 m / s gives 15 000 Hz
v = fλ OR (f =)
(a)
0.022
B1
emergent ray diverging away from the yellow ray AND outside of prism
OR
B1
refracted ray in prism below yellow ray AND above normal
v
B1
enlarged AND inverted AND real underlined
330–350 m / s
B1
any two of: enlarged / inverted / real underlined
Marks
A1
two correct rays traced back and image indicated
Answer
M2
any two rays that start at the top of the image from:
•
seems to come from F1 to lens and emerges paraxially
•
passes through centre of lens undeviated
•
paraxial to the lens and passes through F2
Marks
A1
3.0 × 108 (J)
Answer
C1
(∆E =) cm∆θ OR 2.1 × 103 × 41 000 × 3.5
C1
A1
m
in any form OR (m =) Vd OR 1800 × 0.025 × 920
V
Marks
For examination
from 2020
41 000 kg
d=
Answer
Cambridge IGCSE – Mark Scheme
SPECIMEN
© UCLES 2020
9(b)
9(a)
Question
8(b)
8(a)
Question
0625/04
1 1
d + n
12 6
1
A1
(V8 = 2 × 8 =) 16 V
B1
–ve(ly charged ball) attracted to +ve / repelled from –ve
B1
B1
particles: electrons
direction: from left to right (through ammeter)
Page 9 of 12
B1
ball gets –ve charge (from –ve plate)
Marks
C1
OR alternative route
supply V
24
OR =
OR = 2 (A)
I8 =
12
12
Answer
A1
(V8 =) 16 V
A1
C1
(6 # 12)
18
C1
8
8
V8 = supply V × d n OR = 24 × d n
12
12
OR (RP =)
RS RC
(RS + RC)
(RP =) 4.0 Ω
OR (RP =)
OR (RP =)
1
in any form
1
1 l
b
+
RS RC
C1
(RS =) 12 (Ω)
(RP =)
C1
Marks
For examination
from 2023
RS = RA + RB in any form OR (RS =) RA + RB OR (RS =) 4 + 8
Answer
Cambridge IGCSE – Mark Scheme
SPECIMEN
© UCLES 2020
11(b)
11(a)
Question
10(b)
10(a)(ii)
10(a)(i)
Question
9(c)
Question
0625/04
Q
words, numbers, symbols
t
B1
B1
B3
temperature of hydrogen increases AND a protostar is formed
nuclear fusion begins and outward force from this reaction balances inward force of gravity
any three from:
microwave radiation is observed at all points in space around the Earth o.w.t.t.e.
radiation was produced when the Universe was formed
this radiation has expanded into the microwave region of the electromagnetic spectrum
this is evidence that the Universe expanded
Page 10 of 12
B1
Marks
hydrogen gas in stellar cloud / nebula pulled together by gravity
Answer
A1
(2 × 1014 Am atoms remain after) 940 yrs or 2 half-lives
C1
B1
C1
14
– 6 × 10 ) = 2 × 10
14
4 × 1014 (Am atoms remain after 470 yrs or 1 half-life)
(No of Am atoms remaining = 8 × 10
14
gamma and beta will not produce enough ions / ion pairs per cm
B1
4
a
2
Marks
A1
C1
B1
Answer
8.5 # 10-10
0.25
C1
Marks
For examination
from 2020
237
Np
93
(I =) 3.4 × 10–9 A
correct use of f = 4 Hz OR T = 0.25 s i.e. 8.5 × 10–10 × 4 OR
Q = It in any form OR
Answer
Cambridge IGCSE – Mark Scheme
SPECIMEN
© UCLES 2020
12(b)
12(a)
Question
0625/04
0.050 A
Is # Vs
2.0 # 6
OR
Vp
240
Page 11 of 12
A1
C1
A1
200
IpVp = IsVs in any form OR (Ip =)
C1
Marks
For examination
from 2023
Np # Vs
Ns Vs
8000 # 6
in any form OR (Ns =)
OR
=
Vp
Np Vp
240
Answer
Cambridge IGCSE – Mark Scheme
SPECIMEN
© UCLES 2020
0625/04
Page 12 of 12
BLANK PAGE
Cambridge IGCSE – Mark Scheme
SPECIMEN
For examination
from 2020
PMT
Cambridge IGCSE™
* 4 8 4 4 8 2 3 2 5 3 *
PHYSICS
0625/42
Paper 4 Theory (Extended)
October/November 2022
1 hour 15 minutes
You must answer on the question paper.
No additional materials are needed.
INSTRUCTIONS
●
Answer all questions.
●
Use a black or dark blue pen. You may use an HB pencil for any diagrams or graphs.
●
Write your name, centre number and candidate number in the boxes at the top of the page.
●
Write your answer to each question in the space provided.
●
Do not use an erasable pen or correction fluid.
●
Do not write on any bar codes.
●
You may use a calculator.
●
You should show all your working and use appropriate units.
●
Take the weight of 1.0 kg to be 10 N (acceleration of free fall = 10 m / s2).
INFORMATION
●
The total mark for this paper is 80.
●
The number of marks for each question or part question is shown in brackets [ ].
This document has 16 pages. Any blank pages are indicated.
DC (PQ/CB) 301684/2
© UCLES 2022
[Turn over
PMT
2
1
Fig. 1.1 shows sea water flowing down a channel into a tank without splashing. The water is
flowing at a rate of 800 kg / min. The length and width of the tank are 3.10 m and 1.20 m. The
density of the sea water is 1020 kg / m3.
1.20 m
flowing sea water
3.10 m
channel
tank
Fig. 1.1 (not to scale)
(a) Initially, the tank is empty.
Calculate the depth of water in the tank after 1.00 minute. Give your answer to three significant
figures.
depth = ......................................................... [3]
(b) The height of the water decreases by 0.420 m as it flows down the channel.
Calculate the decrease in gravitational potential energy of the water each second.
decrease in gravitational potential energy = ......................................................... [3]
(c) The water stops flowing. The depth of water in the tank is 0.800 m.
Calculate the pressure at the bottom of the tank due to the water.
pressure = ......................................................... [3]
[Total: 9]
© UCLES 2022
0625/42/O/N/22
PMT
3
2
(a) A pendulum swings with a time period of approximately one second.
Describe how to use a stop-watch to determine the time period of the pendulum.
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
............................................................................................................................................. [3]
(b) Complete Table 2.1 by writing in each space of the right-hand column which one of the
following devices is used to measure the quantity in the left-hand column.
digital balance
measuring cylinder
metre rule
micrometer screw gauge
stop-watch
thermocouple
Table 2.1
quantity
device
volume of water in a glass
width of a small swimming pool
thickness of a piece of aluminium foil
[3]
[Total: 6]
© UCLES 2022
0625/42/O/N/22
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PMT
4
3
(a) Tidal power derives most of its energy from the Moon and part of its energy from the Sun.
(i)
State one other source of power which derives its energy from the Sun.
..................................................................................................................................... [1]
(ii)
State one source of power which does not derive its energy from the Sun.
..................................................................................................................................... [1]
(b) Fig. 3.1 shows a small water turbine driven by a tidal flow of water to generate electrical
power.
surface of sea
flow of water
sea bed
Fig. 3.1
(i)
Explain whether this method of generation of electrical power is renewable.
...........................................................................................................................................
...........................................................................................................................................
..................................................................................................................................... [2]
(ii)
The mass of water passing through the turbine each second is 6.0 × 103 kg. The speed
of the water is 2.0 m / s. 40% of the kinetic energy of the water is converted to electrical
energy.
Calculate the electrical power generated.
power = ......................................................... [4]
[Total: 8]
© UCLES 2022
0625/42/O/N/22
PMT
5
4
(a) Explain, in terms of the momentum of particles, how a gas exerts a pressure.
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
............................................................................................................................................. [3]
(b) The temperature of a sample of gas is increased at constant volume.
State and explain any change in the pressure of the gas.
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
............................................................................................................................................. [2]
(c) Another sample of gas is in a sealed container of volume 170 cm3 and exerts a pressure of
9.0 × 104 Pa. The volume of the container decreases by 70 cm3 at constant temperature.
Calculate the new pressure of the gas.
pressure = ......................................................... [3]
[Total: 8]
© UCLES 2022
0625/42/O/N/22
[Turn over
PMT
6
5
Fig. 5.1 shows an aluminium block after leaving a furnace in a factory.
furnace
aluminium block
factory worker
solid metal rollers
Fig. 5.1
(a) The mass of the block is 1200 kg and it is heated in the furnace from 20 °C to 380 °C. The
aluminium block does not melt.
The specific heat capacity of aluminium is 960 J / (kg °C).
Calculate the thermal energy gained by the block in the furnace.
thermal energy = ......................................................... [3]
(b) Fig. 5.1 shows a factory worker standing 3 m from the block.
State and explain the main process by which thermal energy is transferred to the worker.
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
............................................................................................................................................. [3]
© UCLES 2022
0625/42/O/N/22
PMT
7
(c) State and explain the main process by which thermal energy is transferred from the outer
surface of the solid metal rollers to their interior.
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
............................................................................................................................................. [3]
[Total: 9]
© UCLES 2022
0625/42/O/N/22
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8
6
(a) Fig. 6.1 shows a converging lens and an object OX. The focuses of the lens are labelled F.
X
F
F
O
principal axis
Fig. 6.1
(i)
On Fig. 6.1, carefully draw two rays from X which locate the image of the object. Draw the
image and label it IY.
Measure the distance from IY along the principal axis to the centre line of the lens.
distance = ...............................................................
[4]
(ii)
State two reasons why the image IY is virtual.
1. .......................................................................................................................................
2. .......................................................................................................................................
[2]
© UCLES 2022
0625/42/O/N/22
PMT
9
(b) Fig. 6.2 shows a ray of green light passing into, through and out of a glass prism.
Fig. 6.2
A ray of blue light is incident on the prism on the same path as the incident ray of green light.
On Fig. 6.2, draw the path of the blue light through and out of the prism.
[3]
[Total: 9]
© UCLES 2022
0625/42/O/N/22
[Turn over
PMT
10
7
This question is about the magnetic fields around bar magnets. Fig. 7.1 shows two positions used
by a student doing an experiment.
position 1
position 2
Fig. 7.1
(a) Fig. 7.2 shows a magnet, labelled magnet 1, placed on position 1.
magnet 1
S
position 2
N
Fig. 7.2
On Fig. 7.2, draw lines to show the pattern of the magnetic field produced by magnet 1.
Place arrows on the lines to show the direction of the field.
[3]
(b) Magnet 1 is removed from position 1. Fig. 7.3 shows another magnet, labelled magnet 2,
placed on position 2.
position 1
magnet 2
N
S
Fig. 7.3
On Fig. 7.3, draw, at the right-hand end of position 1, a line with an arrow to show the direction
of the magnetic field produced by magnet 2.
[1]
© UCLES 2022
0625/42/O/N/22
PMT
11
(c) Fig. 7.4 shows magnet 1 placed on position 1 and magnet 2 placed on position 2.
magnet 1
S
magnet 2
N
N
S
Fig. 7.4
(i)
State the direction of the force that the N pole of magnet 2 exerts on the N pole of
magnet 1.
..................................................................................................................................... [1]
(ii)
Justify your answer to (c)(i).
...........................................................................................................................................
..................................................................................................................................... [1]
[Total: 6]
© UCLES 2022
0625/42/O/N/22
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PMT
12
8
Fig. 8.1 shows an electrical circuit.
Y
V
Fig. 8.1
(a) The light intensity at the circuit increases from dark to bright.
State any effect on the resistance of component Y.
...................................................................................................................................................
State and explain any effect on the reading of the voltmeter.
...................................................................................................................................................
...................................................................................................................................................
[3]
(b) The circuit shown in Fig. 8.2 is switched on for 2.0 min.
12 V
4.0 Ω
Fig. 8.2
The current in the 4.0 Ω resistor is 3.0 A and the magnitude of the charge on an electron is
1.6 × 10–19 C.
(i)
Calculate the number of electrons that pass through the resistor each second.
number = ......................................................... [3]
(ii)
Calculate the power dissipated by the resistor.
power = ......................................................... [2]
[Total: 8]
© UCLES 2022
0625/42/O/N/22
PMT
13
9
(a) Draw the symbol for:
(i)
a diode
[1]
(ii)
a NOT gate.
[1]
(b) (i)
Fig. 9.1 shows a digital circuit.
Z
I1
O
I2
Fig. 9.1
Complete the truth table shown in Table 9.1.
Table 9.1
I1
I2
0
0
0
1
1
0
1
1
Z
O
[2]
(ii)
State another single gate which is equivalent to the part of the circuit between I1 and Z.
..................................................................................................................................... [1]
© UCLES 2022
0625/42/O/N/22
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PMT
14
(c) Using two logic gates, design and draw a digital circuit with two inputs and two outputs which
has the truth table shown in Table 9.2.
Use either the usual logic gate symbols or correctly labelled square boxes in your diagram.
Table 9.2
input 1
input 2
output 1
output 2
0
0
0
1
0
1
1
1
1
0
1
1
1
1
1
0
[4]
[Total: 9]
© UCLES 2022
0625/42/O/N/22
PMT
15
10 (a) The magnitude of the charge on a β (beta)-particle is 1.6 × 10–19 C.
(i)
State the proton number and nucleon number of an α (alpha)-particle.
proton number ...................................................................................................................
nucleon number ................................................................................................................
[2]
(ii)
Determine the magnitude of the charge of an α (alpha)-particle.
charge ...............................................................................................................................
[1]
(b) A nucleus of radium-230 consists of 88 protons and 142 neutrons. Radium-230 is radioactive
and decays by β (beta)-emission to an isotope of actinium. The symbol for radium is Ra and
the symbol for actinium is Ac.
Write down the nuclide equation for this decay.
[3]
(c) The half-life of radium-230 is 93 min. A sample contains 9.6 × 10–12 g of radium-230.
Calculate the mass of radium in the sample after 279 min.
mass = ......................................................... [2]
[Total: 8]
© UCLES 2022
0625/42/O/N/22
PMT
16
BLANK PAGE
Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every
reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the
publisher will be pleased to make amends at the earliest possible opportunity.
To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the Cambridge
Assessment International Education Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download
at www.cambridgeinternational.org after the live examination series.
Cambridge Assessment International Education is part of Cambridge Assessment. Cambridge Assessment is the brand name of the University of Cambridge
Local Examinations Syndicate (UCLES), which is a department of the University of Cambridge.
© UCLES 2022
0625/42/O/N/22
PMT
Cambridge IGCSE™
PHYSICS
0625/42
October/November 2022
Paper 4 Theory (Extended)
MARK SCHEME
Maximum Mark: 80
Published
This mark scheme is published as an aid to teachers and candidates, to indicate the requirements of the
examination. It shows the basis on which Examiners were instructed to award marks. It does not indicate the
details of the discussions that took place at an Examiners’ meeting before marking began, which would have
considered the acceptability of alternative answers.
Mark schemes should be read in conjunction with the question paper and the Principal Examiner Report for
Teachers.
Cambridge International will not enter into discussions about these mark schemes.
Cambridge International is publishing the mark schemes for the October/November 2022 series for most
Cambridge IGCSE™, Cambridge International A and AS Level components and some Cambridge O Level
components.
This document consists of 15 printed pages.
© UCLES 2022
[Turn over
PMT
0625/42
Cambridge IGCSE – Mark Scheme
PUBLISHED
Generic Marking Principles
October/November 2022
These general marking principles must be applied by all examiners when marking candidate answers. They should be applied alongside the
specific content of the mark scheme or generic level descriptors for a question. Each question paper and mark scheme will also comply with these
marking principles.
GENERIC MARKING PRINCIPLE 1:
Marks must be awarded in line with:
•
•
•
the specific content of the mark scheme or the generic level descriptors for the question
the specific skills defined in the mark scheme or in the generic level descriptors for the question
the standard of response required by a candidate as exemplified by the standardisation scripts.
GENERIC MARKING PRINCIPLE 2:
Marks awarded are always whole marks (not half marks, or other fractions).
GENERIC MARKING PRINCIPLE 3:
Marks must be awarded positively:
•
•
•
•
•
marks are awarded for correct/valid answers, as defined in the mark scheme. However, credit is given for valid answers which go beyond the
scope of the syllabus and mark scheme, referring to your Team Leader as appropriate
marks are awarded when candidates clearly demonstrate what they know and can do
marks are not deducted for errors
marks are not deducted for omissions
answers should only be judged on the quality of spelling, punctuation and grammar when these features are specifically assessed by the
question as indicated by the mark scheme. The meaning, however, should be unambiguous.
GENERIC MARKING PRINCIPLE 4:
Rules must be applied consistently, e.g. in situations where candidates have not followed instructions or in the application of generic level
descriptors.
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October/November 2022
GENERIC MARKING PRINCIPLE 5:
Marks should be awarded using the full range of marks defined in the mark scheme for the question (however; the use of the full mark range may
be limited according to the quality of the candidate responses seen).
GENERIC MARKING PRINCIPLE 6:
Marks awarded are based solely on the requirements as defined in the mark scheme. Marks should not be awarded with grade thresholds or
grade descriptors in mind.
Science-Specific Marking Principles
1
Examiners should consider the context and scientific use of any keywords when awarding marks. Although keywords may be present, marks
should not be awarded if the keywords are used incorrectly.
2
The examiner should not choose between contradictory statements given in the same question part, and credit should not be awarded for any
correct statement that is contradicted within the same question part. Wrong science that is irrelevant to the question should be ignored.
3
Although spellings do not have to be correct, spellings of syllabus terms must allow for clear and unambiguous separation from other syllabus
terms with which they may be confused (e.g. ethane / ethene, glucagon / glycogen, refraction / reflection).
4
The error carried forward (ecf) principle should be applied, where appropriate. If an incorrect answer is subsequently used in a scientifically
correct way, the candidate should be awarded these subsequent marking points. Further guidance will be included in the mark scheme where
necessary and any exceptions to this general principle will be noted.
5
‘List rule’ guidance
For questions that require n responses (e.g. State two reasons …):
•
•
•
•
•
The response should be read as continuous prose, even when numbered answer spaces are provided.
Any response marked ignore in the mark scheme should not count towards n.
Incorrect responses should not be awarded credit but will still count towards n.
Read the entire response to check for any responses that contradict those that would otherwise be credited. Credit should not be
awarded for any responses that are contradicted within the rest of the response. Where two responses contradict one another, this
should be treated as a single incorrect response.
Non-contradictory responses after the first n responses may be ignored even if they include incorrect science.
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Cambridge IGCSE – Mark Scheme
PUBLISHED
October/November 2022
Calculation specific guidance
Correct answers to calculations should be given full credit even if there is no working or incorrect working, unless the question states ‘show
your working’.
For questions in which the number of significant figures required is not stated, credit should be awarded for correct answers when rounded by
the examiner to the number of significant figures given in the mark scheme. This may not apply to measured values.
For answers given in standard form (e.g. a  10n) in which the convention of restricting the value of the coefficient (a) to a value between 1
and 10 is not followed, credit may still be awarded if the answer can be converted to the answer given in the mark scheme.
Unless a separate mark is given for a unit, a missing or incorrect unit will normally mean that the final calculation mark is not awarded.
Exceptions to this general principle will be noted in the mark scheme.
7
Guidance for chemical equations
Multiples / fractions of coefficients used in chemical equations are acceptable unless stated otherwise in the mark scheme.
State symbols given in an equation should be ignored unless asked for in the question or stated otherwise in the mark scheme.
© UCLES 2022
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Acronyms and shorthand in the mark scheme
acronym/shorthand
explanation
A marks
Final answer marks which are awarded for fully correct final answers.
C marks
Compensatory marks which may be scored to give partial credit when final answer (A) marks for a question have not
been awarded.
B marks
Independent marks which do not depend on other marks.
M marks
Method marks which must be scored before any subsequent final answer (A) marks can be scored.
Brackets ( )
Words not explicitly needed in an answer, however if a contradictory word/phrase/unit to that in the brackets is seen the
mark is not awarded.
Underlining
The underlined word (or a synonym) must be present for the mark to be scored. If the word is a technical scientific term,
the word must be there.
/ or OR
Alternative answers any one of which gains the credit for that mark.
owtte
Or words to that effect.
ignore
Identifies incorrect or irrelevant points which may be disregarded, i.e., not treated as contradictory. Ignore is also used
to indicate an insufficient answer not worthy of credit on its own.
CON
An incorrect point which contradicts any correct point and means the mark cannot be scored.
ecf [question part]
Indicates that a candidate using an erroneous value from the stated question part must be given credit here if the
erroneous value is used correctly here.
cao
correct answer only
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PUBLISHED
Question
1(a)
1(b)
1(c)
Answer
October/November 2022
Marks
A3
(depth =) 0.211 m
 =m / V OR (V =) m /  OR 800 / 1020
C1
V = l  w  d OR (d =) V / (l  w) OR V ÷ 3.72
C1
A3
(∆GPE =) 56(.0) J
GPE = mg∆h OR (GPE =) mg∆h OR (800 / 60)  10  0.42(0)
C1
(mass per second =) 800 / 60 (kg) OR their GPE per minute ÷ 60
C1
A3
(P =) 8200 Pa
(P =) hg
C1
(P =) 1020  10  0.8(00) (Pa)
C1
OR
© UCLES 2022
(P =) F / A
(C1)
F = mg OR
F = 1020  0.8(00)  3.72  10
(C1)
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PUBLISHED
Question
2(a)
2(b)
Answer
Marks
(use stop-watch to) time oscillations
B1
(use of fiduciary) aid to determine a complete cycle
B1
(use of) multiple oscillations AND division (to determine period)
B1
quantity
device
volume of water in a glass
measuring cylinder
width of a small swimming pool
metre rule
thickness of a piece of aluminium foil
micrometer screw gauge
1 mark for each correct response
© UCLES 2022
October/November 2022
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B3
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PUBLISHED
Question
October/November 2022
Answer
Marks
3(a)(i)
any one from:
• fossil fuel / named fossil fuel
• biofuel / wood / crops
• hydro
• wave
• wind
• solar cell / panel.
B1
3(a)(ii)
geothermal OR nuclear
B1
3(b)(i)
yes OR it is renewable
B1
tides are continuous / regular / happen every day / always there / owtte OR Moon / Sun always there OR nothing is
consumed / used up OR tides are an unlimited resource
B1
(power =) 4800 W
A4
3(b)(ii)
© UCLES 2022
KE = ½mv2
C1
(P =) E / t OR (P =) KE / s OR (KE / s =) ½  6(.0)103  2(.0)2
C1
electrical (output) power = 40% of KE / s OR 0.4  12 000
C1
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PUBLISHED
Question
October/November 2022
Answer
Marks
4(a)
any three from:
• moving particles have momentum OR particles hit walls
• momentum changes when particles hit walls
• force exerted (by particles) due to (rate of) change of momentum
• pressure is (total) force (of particles) per unit area (of wall).
B3
4(b)
pressure increases
M1
(there is a) greater change of momentum OR (particles exert) greater force (on same area) OR particles move faster OR
particles have more KE
A1
(pressure =) 1.5  105 Pa
A3
4(c)
© UCLES 2022
p1 V1 = p2 V2 OR (p2 =) p1 V1 /V2 OR pV = constant (for fixed m, fixed T)
C1
(p2 =) 9(.0)  104  170 / 100
C1
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PUBLISHED
Question
5(a)
5(b)
5(c)
© UCLES 2022
October/November 2022
Answer
Marks
A3
(E =) 410 000 000 J OR 410 MJ OR 4.1  108 J
E = mcT OR (E =) mcT OR 1200  960  360
C1
(T =) 360 (°C)
C1
(thermal) radiation
M1
electromagnetic / e-m / infrared / IR (radiation emitted from block)
A1
travels to worker OR is absorbed by worker OR travels without needing a medium
A1
conduction
B1
delocalised / free / moving electrons
B1
any one from:
• (electrons) move (from outer surface) to interior (of rollers)
• (electrons) travel through(out) the solid / large distances
• (electrons) collide with distant particles
• lattice vibrations transfer thermal energy to neighbouring particles OR particles vibrate and cause nearby / adjacent
particles to vibrate OR vibrating particles collide with particles transferring energy.
B1
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PUBLISHED
Question
6(a)(i)
6(a)(ii)
Answer
October/November 2022
Marks
two correct rays from:
• ray from X through centre of lens
• ray from X to lens, parallel to principal axis, refracted through RH focus F
• ray from X (that would pass through LH focus) refracted parallel to principal axis.
M2
two rays correctly extended back, intersecting to left of object and image labelled
A1
IY drawn AND 36 mm ≤ distance ≤ 44 mm
A1
any two from:
• object closer to lens than (one) focal length
• (actual) rays do not meet (at image)
• image cannot be formed on a screen OR image only visible through lens
• object and image on same side (of lens) OR image on LHS of lens/object.
B2
A3
6(b)
© UCLES 2022
blue ray refracted closer to the normal than the green ray as it enters the prism
C1
blue ray refracted away from the normal as it leaves the prism
C1
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Question
Answer
October/November 2022
Marks
(minimum of) one complete loop above magnet AND one complete loop below magnet
M1
additional field lines leaving both poles OR additional loops above and below
A1
(minimum of) two correct arrows (from N to S)
B1
line with arrow to the left
B1
7(c)(i)
(force to the) left OR (force) away from magnet 2 / towards magnet 1
B1
7(c)(ii)
force (on N pole) is in direction of the (magnetic) field / owtte
B1
7(a)
7(b)
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PUBLISHED
Question
8(a)
8(b)(i)
8(b)(ii)
Answer
Marks
(RY) decreases
B1
change in V consistent with stated effect on RY
B1
change in RY / Rtotal consistent with their stated effect on RY
OR
change in proportion of the total p.d. across Y (or proportion of total p.d. across fixed resistor) consistent with their stated
effect on RY
B1
(n =) 1.9  1019
A3
I = Q/t
C1
(n =) 3(.0) / 1.6  10–19 OR (n =) Q / 1.6  10–19
C1
A2
(P =) 36 W
C1
P = IV OR (P =) IV OR 3(.0)  12
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October/November 2022
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PUBLISHED
Question
Answer
October/November 2022
Marks
9(a)(i)
B1
9(a)(ii)
B1
9(b)(i)
9(b)(ii)
I1
I2
Z
O
0
0
1
0
0
1
1
0
1
0
0
1
1
1
0
0
all Z correct
B1
all O correct
B1
NOT
A4
9(c)
© UCLES 2022
OR gate / box labelled OR
C1
NAND gate / box labelled NAND
C1
OR gate with inputs I1 and I2 labelled AND NAND gate with inputs I1 and I2 labelled
C1
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Question
10(a)(i)
10(a)(ii)
10(b)
Answer
B1
(nucleon number) 4
B1
3.2  10–19 (C)
B1
230
88Ra
A3
0
→ 230
89Ac + –1
C2
A2
(mass =) 1.2  10–12 g
C1
3 half-lives OR 9.6  10–12 / 8 OR 9.6  10–12 / 23
© UCLES 2022
Marks
(proton number) 2
any two from:
• nucleon numbers 230 on left AND 230 on right
• Ra and proton number 88 on left AND Ac and proton number 89 on right
0
•
.
–1
10(c)
October/November 2022
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Cambridge IGCSE™
* 2 7 3 6 6 6 7 1 5 3 *
PHYSICS
0625/62
Paper 6 Alternative to Practical
February/March 2021
1 hour
You must answer on the question paper.
No additional materials are needed.
INSTRUCTIONS
●
Answer all questions.
●
Use a black or dark blue pen. You may use an HB pencil for any diagrams or graphs.
●
Write your name, centre number and candidate number in the boxes at the top of the page.
●
Write your answer to each question in the space provided.
●
Do not use an erasable pen or correction fluid.
●
Do not write on any bar codes.
●
You may use a calculator.
●
You should show all your working and use appropriate units.
INFORMATION
●
The total mark for this paper is 40.
●
The number of marks for each question or part question is shown in brackets [ ].
This document has 16 pages. Any blank pages are indicated.
DC (CJ/CGW) 203602/3
© UCLES 2021
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1
A student investigates the motion of an oscillating metre rule.
He uses the apparatus shown in Fig. 1.1.
clamps
vertical
threads
d
metre rule
stands
horizontal bench
Fig. 1.1
(a) The student ensures that the metre rule is horizontal.
Briefly describe how to check that the metre rule is horizontal. You may draw a diagram or
draw on Fig. 1.1 if it helps to explain your answer.
...................................................................................................................................................
...................................................................................................................................................
............................................................................................................................................. [1]
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(b) The student moves the stands so that the vertical threads are at the marks on the metre rule
shown in Fig. 1.2.
vertical
threads
1
2
3
96
97
98
99
Fig. 1.2
Calculate the distance d between the threads.
d =................................................. cm [1]
(c) He twists the metre rule a small amount, as shown in Fig. 1.3, and then lets it go so that it
oscillates in a rotating motion.
metre rule seen from above
one
oscillation
twist
Fig. 1.3
He measures the time t for 5 complete oscillations of the metre rule.
3.63
t =..........................................................
s
Suggest why it is useful to take a trial reading for this experiment.
...................................................................................................................................................
............................................................................................................................................. [1]
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(d) The student carries out the same procedure for d values of 20.0 cm, 30.0 cm, 40.0 cm, 50.0 cm
and 60.0 cm. His readings are shown in Table 1.1.
Table 1.1
/
1 1
T s
d / cm
t/s
20.0
17.85
30.0
11.36
0.44
40.0
8.77
0.57
50.0
6.93
0.72
60.0
5.68
0.88
For distance d = 20.0 cm, calculate and record in Table 1.1, the value of 1 where T is the time
T
for 1 oscillation of the metre rule.
1
5
Use the value of time t from Table 1.1 and the equation = .
T t
[1]
(e) Plot a graph of distance d / cm (y-axis) against
/
1 1
(x-axis).
T s
[4]
(f)
Determine the gradient G of the graph. Show clearly on the graph how you obtained the
necessary information.
G =...................................................... [1]
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5
(g) (i)
Explain why it is more accurate to measure the time for 5 oscillations rather than for
1 oscillation.
...........................................................................................................................................
...........................................................................................................................................
..................................................................................................................................... [1]
(ii)
Describe how the experiment could be improved to make the readings more reliable.
...........................................................................................................................................
...........................................................................................................................................
..................................................................................................................................... [1]
[Total: 11]
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2
Students investigate the cooling of hot water in two different cups.
They use the apparatus shown in Fig. 2.1.
Cup A is made from thin plastic. The top of cup A has an inside diameter of 7 cm. Cup B is made
from expanded polystyrene. The top of cup B has an inside diameter of 8 cm.
thermometer
lids
bench
cup A
cup B
30
20
10
Fig. 2.1
(a) (i)
Record the room temperature θR shown on the thermometer in Fig. 2.1.
θR =...................................................... [1]
(ii)
Describe one precaution that you would take to ensure that temperature readings in the
experiment are as accurate as possible.
...........................................................................................................................................
..................................................................................................................................... [1]
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(b) A volume of 100 cm3 of hot water is poured into each cup and the initial temperature θ is
recorded in Table 2.1.
The temperature of the water in each cup is recorded every 30 s. The values are shown in
Table 2.1.
Table 2.1
cup A
cup B
t/
θ/
θ/
0
87.5
88.0
30
84.5
86.0
60
82.0
84.5
90
80.5
83.0
120
79.0
82.0
150
78.0
81.0
180
77.0
80.5
Complete the headings in Table 2.1.
[1]
(c) Write a conclusion stating which cup, A or B, is the more effective in reducing the cooling rate
of the hot water in this experiment.
Justify your answer by reference to the results.
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
............................................................................................................................................. [2]
(d) (i)
Calculate xA, the average cooling rate for cup A over the whole experiment. Use the
readings for cup A from Table 2.1 and the equation
xA =
θ0 – θ180
T
where T = 180 s and θ0 and θ180 are the temperatures at time t = 0 and at time t = 180 s.
Include the unit for the cooling rate.
xA =...................................................... [2]
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(ii)
Suggest an additional experiment to show how the lid affects the cooling rate of cup A.
Explain how to use the additional results to show the effect.
additional experiment ........................................................................................................
...........................................................................................................................................
explanation ........................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
[2]
(e) A student wishes to compare the effect of the materials of the cups on cooling rates. Suggest
two variables that she should control to make this test fair.
1. ...............................................................................................................................................
...................................................................................................................................................
2. ...............................................................................................................................................
...................................................................................................................................................
[2]
[Total: 11]
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3
A student investigates a resistor and a lamp connected in series.
She uses the circuit shown in Fig. 3.1.
power supply
resistance wire
A
crocodile clip
V
Fig. 3.1
(a) The student moves the crocodile clip on the resistance wire so that the value of the potential
difference VL across the lamp is 2.0 V.
She measures the current I for the lamp and resistor in series.
She then connects the voltmeter to measure the potential difference VR across the resistor.
0.6
0.4
0.2
1.0
0
3
2
1
0.8
4
5
0
A
V
Fig. 3.2
Fig. 3.3
Read, and record in Table 3.1, the values of I and VR shown on the meters in Fig. 3.2 and
Fig. 3.3.
[2]
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(b) The student repeats the steps in (a) for values of VL = 1.0 V and VL = 0.5 V.
Her readings are shown in Table 3.1.
Table 3.1
I /A
VR / V
1.0
0.15
3.0
0.5
0.12
2.4
VL / V
RL / Ω
RR / Ω
2.0
Calculate, and record in Table 3.1, the resistance of the lamp RL for each value of VL.
VL
Use the values of VL and I from Table 3.1 and the equation RL = .
I
Calculate, and record in Table 3.1, the resistance of the resistor RR for each value of VL.
VR
.
Use the values of VR and I from Table 3.1 and the equation RR =
I
(c) (i)
[2]
Describe the pattern of any change in the value of RL as VL decreases.
...........................................................................................................................................
..................................................................................................................................... [1]
(ii)
A student suggests that RR should be constant.
State whether your results support this suggestion.
Justify your statement by reference to values from Table 3.1.
statement ..........................................................................................................................
...........................................................................................................................................
justification ........................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
[2]
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(d) A student wishes to determine the resistance of the lamp RL when the potential difference
across the lamp VL = 0.0 V.
Describe how the experiment can be extended to do this with the help of a suitable graph.
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
............................................................................................................................................. [2]
(e) It is possible to use a variable resistor instead of a resistance wire to change the potential
difference across the lamp.
Complete the circuit in Fig. 3.4 to show:
•
•
a variable resistor used for this purpose
the voltmeter connected to measure the potential difference across the resistor
power supply
A
Fig. 3.4
[2]
[Total: 11]
© UCLES 2021
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12
4
A student investigates the motion of a ball rolling down a slope.
Plan an experiment which enables him to investigate how one factor affects the average speed of
the ball.
Average speed can be calculated using the equation:
average speed =
distance travelled
time taken
The apparatus available includes:
balls of various sizes and materials
a board which can act as a slope
blocks to support one end of the board.
In your plan, you should:
•
state a factor which can be measured
•
list any additional apparatus needed
•
explain briefly how to carry out the experiment including exactly which measurements are to
be taken
•
state the key variables to be kept constant
•
draw a table, or tables, with column headings, to show how to display the readings
(you are not required to enter any readings in the table)
•
explain how to use the readings to reach a conclusion.
You may draw a diagram if it helps to explain your plan.
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..................................................................................................................................................................
..................................................................................................................................................................
..................................................................................................................................................................
..................................................................................................................................................................
..................................................................................................................................................................
..................................................................................................................................................................
..................................................................................................................................................................
..................................................................................................................................................................
..................................................................................................................................................................
..................................................................................................................................................................
..................................................................................................................................................................
..................................................................................................................................................................
..................................................................................................................................................................
..................................................................................................................................................................
..................................................................................................................................................................
..................................................................................................................................................................
..................................................................................................................................................................
..................................................................................................................................................................
..................................................................................................................................................................
..................................................................................................................................................................
..................................................................................................................................................................
..................................................................................................................................................................
..................................................................................................................................................................
..................................................................................................................................................................
..................................................................................................................................................................
..................................................................................................................................................................
............................................................................................................................................................ [7]
[Total: 7]
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© UCLES 2021
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Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every
reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the
publisher will be pleased to make amends at the earliest possible opportunity.
To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the Cambridge
Assessment International Education Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download
at www.cambridgeinternational.org after the live examination series.
Cambridge Assessment International Education is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of the University of
Cambridge Local Examinations Syndicate (UCLES), which itself is a department of the University of Cambridge.
© UCLES 2021
0625/62/F/M/21
PMT
Cambridge IGCSE™
PHYSICS
0625/22
Paper 2 Multiple Choice (Extended)
February/March 2022
MARK SCHEME
Maximum Mark: 40
Published
This mark scheme is published as an aid to teachers and candidates, to indicate the requirements of the
examination.
Mark schemes should be read in conjunction with the question paper and the Principal Examiner Report for
Teachers.
Cambridge International will not enter into discussions about these mark schemes.
Cambridge International is publishing the mark schemes for the February/March 2022 series for most
Cambridge IGCSE™, Cambridge International A and AS Level components and some Cambridge O Level
components.
This document consists of 3 printed pages.
© UCLES 2022
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0625/22
Cambridge IGCSE – Mark Scheme
PUBLISHED
Question
Answer
February/March 2022
Marks
1
B
1
2
D
1
3
D
1
4
A
1
5
A
1
6
C
1
7
C
1
8
D
1
9
D
1
10
B
1
11
D
1
12
B
1
13
C
1
14
B
1
15
B
1
16
C
1
17
B
1
18
B
1
19
C
1
20
C
1
21
B
1
22
D
1
23
C
1
24
B
1
25
D
1
26
A
1
27
D
1
28
D
1
© UCLES 2022
Page 2 of 3
PMT
0625/22
Cambridge IGCSE – Mark Scheme
PUBLISHED
Question
Answer
February/March 2022
Marks
29
A
1
30
B
1
31
A
1
32
A
1
33
A
1
34
C
1
35
B
1
36
C
1
37
D
1
38
A
1
39
D
1
40
B
1
© UCLES 2022
Page 3 of 3
Cambridge IGCSE™
*0123456789*
PHYSICS0625/06
Paper 6 Alternative to Practical
For examination from 2023
1 hour
SPECIMEN PAPER
You must answer on the question paper.
No additional materials are needed.
INSTRUCTIONS
●
Answer all questions.
●
Use a black or dark blue pen. You may use an HB pencil for any diagrams or graphs.
●
Write your name, centre number and candidate number in the boxes at the top of the page.
●
Write your answer to each question in the space provided.
●
Do not use an erasable pen or correction fluid.
●
Do not write on any bar codes.
●
You may use a calculator.
●
You should show all your working and use appropriate units.
INFORMATION
●
The total mark for this paper is 40.
●
The number of marks for each question or part question is shown in brackets [ ].
This document has 14 pages. Any blank pages are indicated.
© UCLES 2020
[Turn over
2
1
A student investigates how partly covering the top of a beaker of water affects the rate at which
the water cools.
The apparatus used is shown in Fig. 1.1.
thermometer
lid partly covering
beaker
water
Fig. 1.1
(a)
–10
0
10
20
30
40
50
60
70
80
90
100
110
°C
Fig. 1.2
Read and record the room temperature θR, shown on the thermometer in Fig. 1.2.
θR = ........................................................... [1]
© UCLES 2020
0625/06/SP/23
3
(b) The student pours 100 cm3 of hot water into a beaker. She places lid A on the beaker. This
leaves half of the top of the beaker uncovered, as shown in Fig. 1.3.
She records the temperature of the water in the beaker and immediately starts a stopwatch.
She records the temperature θ of the water every 30 s. Her readings are shown in Table 1.1.
She repeats the procedure using lid B. This leaves a quarter of the top of the beaker
uncovered, as shown in Fig. 1.4.
lid A
beaker
beaker
lid B
uncovered area
uncovered area
Fig. 1.3
Fig. 1.4
Complete the headings row in Table 1.1.
Complete the time t column in Table 1.1.
Table 1.1
beaker with
lid A
beaker with
lid B
t / .....
θ / .....
θ / .....
0
80.0
81.0
77.0
79.0
74.5
77.5
72.5
76.0
70.5
75.0
69.0
74.0
68.0
73.5
[2]
(c) Describe a precaution that should be taken to ensure that the temperature readings are as
accurate as possible in the experiment.
....................................................................................................................................................
............................................................................................................................................... [1]
© UCLES 2020
0625/06/SP/23
[Turn over
4
(d) (i) Write a conclusion to this experiment, stating for which lid the rate of cooling is greater.
Justify your answer with reference to the results.
............................................................................................................................................
............................................................................................................................................
............................................................................................................................................
....................................................................................................................................... [2]
(ii)
Suggest a change to the apparatus that produces a greater difference between the rates
of cooling for lid A and lid B. Explain why the change produces a greater difference.
change ...............................................................................................................................
............................................................................................................................................
explanation .........................................................................................................................
............................................................................................................................................
[2]
(e) Another student thinks that the cooling rate is directly proportional to the percentage of
the surface area uncovered. He draws a graph of cooling rate against the percentage of
uncovered area to investigate this.
Describe how his graph line shows whether the rate of cooling and the percentage of
uncovered surface area are directly proportional.
....................................................................................................................................................
....................................................................................................................................................
............................................................................................................................................... [2]
(f)
Students in other countries are doing the same experiment.
State one factor they must keep the same to obtain similar readings.
....................................................................................................................................................
............................................................................................................................................... [1]
© UCLES 2020
[Total: 11]
0625/06/SP/23
5
BLANK PAGE
© UCLES 2020
0625/06/SP/23
[Turn over
6
2
A student is investigating a resistance wire. She uses the circuit shown in Fig. 2.1.
power supply
A
Q
P
crocodile clip
resistance wire
l
Fig. 2.1
(a) (i)
On Fig. 2.1, draw a voltmeter connected to measure the potential difference (p.d.) V
across terminals P and Q.[1]
(ii)
The student connects the crocodile clip to a length l = 90.0 cm of the resistance wire and
measures the potential difference V across terminals P and Q and the current I in the
circuit.
1
2
3
0.2
4
5
0
0.4
0.6
1.0
0
V
0.8
A
Fig. 2.2
Fig. 2.3
Read, and record in Table 2.1, the values of V and I shown on the meters in Fig. 2.2 and
Fig. 2.3.
[2]
© UCLES 2020
0625/06/SP/23
7
(b) The student then connects the crocodile clip to lengths l = 60.0 cm and l = 40.0 cm of the
resistance wire. She measures the potential difference V across terminals P and Q and the
current I in the circuit. Her readings are shown in Table 2.1.
Complete the column headings in Table 2.1.
Table 2.1
l / cm
V/
I/
2.5
0.49
R/Ω
R Ω
X
/
l cm
90.0
60.0
40.0
2.3
0.74
[1]
Calculate, and record in Table 2.1, the resistance R of each length l of the wire.
V
Use the readings from the table and the equation R = .
I
(c) (i)
[2]
(ii)
Calculate, and record in Table 2.1, the value of
R
for each length l of the wire.
l
[1]
(d) Another student suggests that the values of
R
for each length of wire should be the same.
l
State whether the results support this suggestion.
Justify your statement with reference to values from the results.
statement ...................................................................................................................................
justification .................................................................................................................................
....................................................................................................................................................
....................................................................................................................................................
[1]
© UCLES 2020
0625/06/SP/23
[Turn over
8
(e) Suggest one difficulty which explains why different students, doing the experiment carefully
with the same equipment, may not obtain identical results.
....................................................................................................................................................
....................................................................................................................................................
............................................................................................................................................... [1]
(f)
A student finds that during the experiment, the wire becomes hot because there is a high
current.
He decides to use a variable resistor to prevent this.
(i)
Draw an X on the circuit in Fig. 2.1 to show where a variable resistor is connected for this
purpose in the experiment.
(ii)
[1]
In the space below, sketch the circuit symbol for a variable resistor.
[1]
© UCLES 2020
[Total: 11]
0625/06/SP/23
9
3
A student investigates the magnification produced by a converging lens.
He is using the apparatus shown in Fig. 3.1.
illuminated
triangle
screen
u
lens
Fig. 3.1
(a) The illuminated object consists of a triangular-shaped hole in a piece of card. Fig. 3.2 shows,
full size, the illuminated object.
card
ho
Fig. 3.2
Measure and record the height hO of the triangular-shaped hole.
hO =...................................................... cm [1]
© UCLES 2020
0625/06/SP/23
[Turn over
10
(b) The distance between the illuminated object and the centre of the lens is set to u = 20.0 cm.
The screen is moved until a focused image of the illuminated object is seen, as shown in
Fig. 3.3.
screen
image
hI
Fig. 3.3
The student repeats the procedure for u = 30.0 cm, u = 40.0 cm, u = 50.0 cm and u = 60.0 cm.
His results are shown in Table 3.1.
Measure, and record in the first row of Table 3.1, the height hI of the image.
Using your results from (a) and the equation M =
value in Table 3.1.
hO
, calculate a value M and record this
hI
Table 3.1
u / cm
hI / cm
M
30.0
1.5
0.93
40.0
0.9
1.6
50.0
0.6
2.3
20.0
60.0
0.5
2.8
[2]
© UCLES 2020
0625/06/SP/23
11
(c) Plot a graph of u / cm (y-axis) against M (x-axis).
You do not have to start your axes at the origin (0, 0).
[4]
(d) Determine the gradient G of the graph.
Show clearly on the graph how you obtained the necessary information.
G =.............................................................[2]
(e) Describe one difficulty that might be experienced when measuring the height of the image hI.
Suggest an improvement to the apparatus to reduce this difficulty.
difficulty ......................................................................................................................................
....................................................................................................................................................
improvement ..............................................................................................................................
....................................................................................................................................................
[2]
© UCLES 2020
[Total: 11]
0625/06/SP/23
[Turn over
12
4
A student is investigating the factors that affect the size of the crater (hole) a ball makes when it is
dropped into sand.
Plan an experiment to investigate one factor that affects the size of the crater.
The apparatus available includes:
metal balls of different sizes
a tray of dry sand.
Write a plan for the experiment.
In your plan, you should:
•
state which factor is being investigated
•
state a key variable to keep constant
•
list any additional apparatus needed
•
explain briefly how to do the experiment, including what is measured and how this is done
•
state how to obtain reliable results for this experiment
•
suggest a suitable graph to be drawn from the results.
You may draw a diagram if it helps to explain your plan.
© UCLES 2020
0625/06/SP/23
13
...........................................................................................................................................................
...........................................................................................................................................................
...........................................................................................................................................................
...........................................................................................................................................................
...........................................................................................................................................................
...........................................................................................................................................................
...........................................................................................................................................................
...........................................................................................................................................................
...........................................................................................................................................................
...........................................................................................................................................................
...........................................................................................................................................................
...........................................................................................................................................................
...........................................................................................................................................................
...........................................................................................................................................................
...........................................................................................................................................................
...........................................................................................................................................................
...........................................................................................................................................................
...........................................................................................................................................................
...........................................................................................................................................................
...........................................................................................................................................................
...........................................................................................................................................................
...........................................................................................................................................................
...........................................................................................................................................................
...........................................................................................................................................................
...........................................................................................................................................................
...........................................................................................................................................................
...................................................................................................................................................... [7]
© UCLES 2020
[Total: 7]
0625/06/SP/23
14
BLANK PAGE
Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every
reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the
publisher will be pleased to make amends at the earliest possible opportunity.
Cambridge Assessment International Education is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of the University of
Cambridge Local Examinations Syndicate (UCLES), which itself is a department of the University of Cambridge.
© UCLES 2020
0625/06/SP/23
Cambridge IGCSE™
0625/06
PHYSICS
For examination from 2023
Paper 6 Alternative to Practical
MARK SCHEME
Maximum Mark: 40
Specimen
This document has 10 pages. Any blank pages are indicated.
© UCLES 2020
[Turn over
Cambridge IGCSE – Mark Scheme
SPECIMEN
For examination
from 2023
the specific content of the mark scheme or the generic level descriptors for the question
the specific skills defined in the mark scheme or in the generic level descriptors for the question
the standard of response required by a candidate as exemplified by the standardisation scripts.
marks are awarded for correct/valid answers, as defined in the mark scheme. However, credit is given for valid answers which go beyond the
scope of the syllabus and mark scheme, referring to your Team Leader as appropriate
marks are awarded when candidates clearly demonstrate what they know and can do
marks are not deducted for errors
marks are not deducted for omissions
answers should only be judged on the quality of spelling, punctuation and grammar when these features are specifically assessed by the
question as indicated by the mark scheme. The meaning, however, should be unambiguous.
© UCLES 2020
Page 2 of 10
Marks should be awarded using the full range of marks defined in the mark scheme for the question (however; the use of the full mark range may
be limited according to the quality of the candidate responses seen).
GENERIC MARKING PRINCIPLE 5:
Rules must be applied consistently, e.g. in situations where candidates have not followed instructions or in the application of generic level
descriptors.
GENERIC MARKING PRINCIPLE 4:
•
•
•
•
•
Marks must be awarded positively:
GENERIC MARKING PRINCIPLE 3:
Marks awarded are always whole marks (not half marks, or other fractions).
GENERIC MARKING PRINCIPLE 2:
•
•
•
Marks must be awarded in line with:
GENERIC MARKING PRINCIPLE 1:
These general marking principles must be applied by all examiners when marking candidate answers. They should be applied alongside the specific
content of the mark scheme or generic level descriptors for a question. Each question paper and mark scheme will also comply with these marking
principles.
Generic Marking Principles
0625/06
Cambridge IGCSE – Mark Scheme
SPECIMEN
For examination
from 2023
•
•
•
•
•
Page 3 of 10
The response should be read as continuous prose, even when numbered answer spaces are provided.
Any response marked ignore in the mark scheme should not count towards n.
Incorrect responses should not be awarded credit but will still count towards n.
Read the entire response to check for any responses that contradict those that would otherwise be credited. Credit should not be
awarded for any responses that are contradicted within the rest of the response. Where two responses contradict one another, this should
be treated as a single incorrect response.
Non-contradictory responses after the first n responses may be ignored even if they include incorrect science.
For questions that require n responses (e.g. State two reasons …):
‘List rule’ guidance
© UCLES 2020
5
4The error carried forward (ecf) principle should be applied, where appropriate. If an incorrect answer is subsequently used in a scientifically
correct way, the candidate should be awarded these subsequent marking points. Further guidance will be included in the mark scheme where
necessary and any exceptions to this general principle will be noted.
3Although spellings do not have to be correct, spellings of syllabus terms must allow for clear and unambiguous separation from other syllabus
terms with which they may be confused (e.g. ethane / ethene, glucagon / glycogen, refraction / reflection).
2The examiner should not choose between contradictory statements given in the same question part, and credit should not be awarded for any
correct statement that is contradicted within the same question part. Wrong science that is irrelevant to the question should be ignored.
1Examiners should consider the context and scientific use of any keywords when awarding marks. Although keywords may be present, marks
should not be awarded if the keywords are used incorrectly.
Science-Specific Marking Principles
Marks awarded are based solely on the requirements as defined in the mark scheme. Marks should not be awarded with grade thresholds or grade
descriptors in mind.
GENERIC MARKING PRINCIPLE 6:
0625/06
Calculation specific guidance
Cambridge IGCSE – Mark Scheme
SPECIMEN
For examination
from 2023
Guidance for chemical equations
© UCLES 2020
Page 4 of 10
State symbols given in an equation should be ignored unless asked for in the question or stated otherwise in the mark scheme.
Multiples / fractions of coefficients used in chemical equations are acceptable unless stated otherwise in the mark scheme.
7
Unless a separate mark is given for a unit, a missing or incorrect unit will normally mean that the final calculation mark is not awarded.
Exceptions to this general principle will be noted in the mark scheme.
For answers given in standard form (e.g. a × 10n) in which the convention of restricting the value of the coefficient (a) to a value between 1 and
10 is not followed, credit may still be awarded if the answer can be converted to the answer given in the mark scheme.
For questions in which the number of significant figures required is not stated, credit should be awarded for correct answers when rounded by
the examiner to the number of significant figures given in the mark scheme. This may not apply to measured values.
Correct answers to calculations should be given full credit even if there is no working or incorrect working, unless the question states ‘show
your working’.
6
0625/06
‘or words to that effect’
‘significant figures’ – answers are normally acceptable to any number of significant figures ⩾ 2. Any exceptions to this general
rule will be specified in the mark scheme.
o.w.t.t.e.
s.f.
© UCLES 2020
Page 5 of 10
Work which has been crossed out and not replaced but can easily be read, should be marked as if it had not been crossed
out.
‘error carried forward’
e.c.f.
Crossed-out work
Indicates that something which is not correct or irrelevant is to be disregarded.
Ignore / Ig
Only accept these where specified in the mark scheme.
A less than ideal answer which should be marked correct.
Accept / Acc
Fractions
Indicates that an incorrect answer is not to be disregarded but cancels another otherwise correct alternative offered by the
candidate for this mark.
NOT / not
If the only error in arriving at a final answer is because given or previously calculated data has clearly been misread but used
correctly, all but the final A mark can be awarded.
Indicates alternative answers, any one of which is satisfactory for scoring the marks.
OR / or
Transcription errors
Statements on both sides of the AND are needed for that mark.
AND / and
If the only error in arriving at a final answer is clearly an arithmetic one, all but the final A mark can be awarded. Regard a
power of ten error as an arithmetic error.
The word or phrase in brackets is not required but sets the context.
(brackets)
Arithmetic errors
Actual word underlined must be used by candidate (grammatical variants accepted).
underline
For examination
from 2023
Alternative answers for the same marking point.
Cambridge IGCSE – Mark Scheme
SPECIMEN
/
Abbreviations and guidance
0625/06
1
1
1
correct mention of comparative temperature change over 0 to 180 s
any suitable change to apparatus relating to comparison, e.g.
insulate sides / stand on mat
use plastic beaker
thicker lid
use of fan
use wider beaker
matching valid explanation, e.g.
thermal energy only escapes from surface
less transfer of thermal energy by sides / bottom
less conduction through lid
larger surface area (for evaporation to occur)
© UCLES 2020
1(f)
1(e)
1
1
through the origin
any appropriate factor, e.g.
volume of water
initial temperature of water
(same) lids
type / material / size of beaker
room temperature / appropriate environmental factor
1
straight line
Page 6 of 10
1
beaker with lid A (has a greater rate of cooling)
1(d)(i)
1(d)(ii)
1
appropriate precaution, e.g. avoidance of parallax (only if explained) / wait until reading stops rising (at start)
1
30, 60, 90, 120, 150, 180
1(c)
1
s, °C, °C all correct
1(b)
1
Marks
For examination
from 2023
21(.0) (°C)
Answer
Cambridge IGCSE – Mark Scheme
SPECIMEN
1(a)
Question
0625/06
7.2
, 5.1, 3.1 (Ω)
e.c.f.
Page 7 of 10
correct symbol for variable resistor (rectangle with strike-through arrow only)
2(f)(ii)
© UCLES 2020
in series between power supply and either voltmeter terminal
2(f)(i)
1
1
1
any one from:
difficult to judge position of crocodile clip
difficult to measure wire to nearest mm
contact between wire and crocodile clip not precise
difficult to interpolate readings on meters between graduations
2(e)
1
1
R 0.080
:
, 0.085, 0.078
l e.c.f.
1
1
statement matching results with values quoted AND matching justification (e.g. ‘within the limits of experimental accuracy’)
correct calculations of
consistent 2 or consistent 3 s.f.
correct calculations of R:
2(d)
2(c)(ii)
2(c)(i)
1
1
I = 0.36 (A)
correct units: V, A
1
V = 2.6 (V)
2(a)(ii)
2(b)
1
Marks
For examination
from 2023
correct voltmeter symbol in parallel with P and Q
Answer
Cambridge IGCSE – Mark Scheme
SPECIMEN
2(a)(i)
Question
0625/06
© UCLES 2020
3(e)
3(d)
3(c)
3(b)
3(a)
Question
0625/06
1
matching improvement to apparatus, e.g.
use translucent screen and view from behind OR fix ruler / grid to screen OR mark extremities of image and measure later OR
use larger object
Page 8 of 10
1
any inherent difficulty, e.g.
hand / ruler in way of image OR some images too small to measure accurately
1
triangle method seen on graph occupying at least half of line
1
well-judged line and thin line
1
1
plots all correct to ½ small square and precise plots
G in range 15.0 to 17.0
1
appropriate scales (plots occupying at least ½ grid)
1
1
1
0.31
from hO and hI)
e.c.f.
1
Marks
For examination
from 2023
axes with correct orientation, both labelled with quantity and unit
M to 2 s.f. NOT use of recurring symbol
hI present (EXPECT 4.5 cm) AND M calculation correct (EXPECT
hO = 1.4 (cm)
Answer
Cambridge IGCSE – Mark Scheme
SPECIMEN
© UCLES 2020
4
Question
0625/06
1
1
1
1
1
1
MP2 control variable:
named variable which should be kept constant, e.g. height of drop, depth of sand
MP3 apparatus:
metre rule and any apparatus essential to variable under test, e.g. balance
MP4 method:
measure factor under test
AND drop ball
AND measure diameter / depth of depression
MP5 repeat for new value of variable under test
MP6 additional point:
repeat experiment or each value of factor AND average /
means of measuring depth / diameter of crater accurately /
apparatus for measuring diameter of ball accurately /
measure diameter of ball / crater in different places (and take mean) /
smooth / flatten sand surface /
at least 5 sets of data taken /
reliable means of releasing ball /
sensible values for factor quoted
MP7 graph:
diameter / depth of depression vs appropriate continuous variable (NOT ‘size’ of ball without qualification)
Page 9 of 10
1
Marks
For examination
from 2023
MP1 factor:
clear statement of appropriate variable to test, e.g. mass of ball
Answer
Cambridge IGCSE – Mark Scheme
SPECIMEN
© UCLES 2020
0625/06
Page 10 of 10
BLANK PAGE
Cambridge IGCSE – Mark Scheme
SPECIMEN
For examination
from 2023