Cambridge Lower Secondary Checkpoint
SCIENCE
1113/01
Paper 1
October 2021
45 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 should show all your working in the booklet.
• You may use a calculator.
INFORMATION
• The total mark for this paper is 50.
• The number of marks for each question or part question is shown in brackets [ ].
This document has 16 pages. Any blank pages are indicated.
IB21 10_1113_01/9RP
© UCLES 2021
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2
1
The table describes some parts of the circulatory system.
Complete the table.
part
function
artery
carries blood from the heart
heart
allows exchange of substances between blood and organs
vein
[3]
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3
2
The diagram shows a cooling curve for a pure substance.
gas
liquid
temperature
in C
X
freezing
solid
time
in minutes
(a) Which word describes the process X on the cooling curve?
Circle the correct answer.
boiling
condensing
evaporating
melting
[1]
(b) Describe two things that happen to the particles of the substance during freezing.
1
2
[2]
(c) A solid is heated until it becomes a gas.
Sketch a graph to show how the temperature changes during this process.
Use the axes provided.
temperature
in C
time
in minutes
[2]
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4
3
Look at the diagram of the Sun and eight planets.
Sun
A
B
C
D
E
F
H
G
NOT TO SCALE
(a) Which letter represents the Earth?
[1]
(b) Which letter represents the planet that takes the longest time to orbit the Sun?
[1]
(c) Which letter represents the largest planet in the Solar System?
[1]
(d) Write down the names of planets B, F and H.
B
F
H
[1]
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4
This cactus lives in a hot and dry desert.
stem
spines
sand
root
(a) The cactus has long roots that spread out in the sand.
(i) Suggest how the roots help the cactus survive in the hot and dry desert.
[1]
(ii) Explain one other way the cactus is adapted to living in the hot and dry desert.
[1]
(b) The cactus is eaten by kangaroo rats.
The kangaroo rats are eaten by snakes.
Desert foxes feed on snakes.
Complete the food chain for these organisms.
[2]
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5
Jamila makes zinc sulfate.
She uses an acid and zinc metal.
The diagram shows the stages Jamila uses to make zinc sulfate.
The stages are not in the correct order.
A
heat
heat the filtrate to concentrate the solution
B
filter the reaction mixture
C
add excess zinc to the acid then gently heat
D
dry the zinc sulfate crystals with filter paper
E
leave the filtrate to evaporate slowly
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(a) Put the stages in order to show the correct method.
One has been done for you.
A
[2]
(b) Write down the name of the acid Jamila uses to make zinc sulfate.
[1]
(c) When Jamila adds zinc to the acid a gas is made.
Write down the name of this gas.
[1]
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6
Oliver investigates how the number of lamps in a circuit affects the current.
He connects the lamps in series.
He uses identical lamps.
Oliver writes his results in a table.
number
of lamps
current
in A
1
6.0
2
3.0
3
2.8
4
1.5
5
1.0
(a) Draw a graph of the results by:
•
labelling the number of lamps on the x-axis
•
labelling the current on the y-axis
•
plotting all the points.
[3]
(b) Complete the graph by:
•
putting a circle around the anomalous result
•
joining the other points with a smooth curve.
[2]
(c) Describe two patterns in his results.
1
2
[2]
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7
This question is about growing tomato plants.
(a) (i) Write down the name of the process in tomato plants which uses carbon dioxide.
[1]
(ii) Write down the name of the two products of this process.
and
[2]
(iii) State one reason why this process is important for animals.
[1]
(b) Tomato plants need to absorb mineral salts.
(i) Write down the name of the part of a plant that absorbs mineral salts.
[1]
(ii) Describe how mineral salts are transported in plants.
[1]
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8
Aiko investigates the reaction of magnesium with hydrochloric acid.
The diagram shows her equipment.
X
delivery tube
bowl
water
25 cm3 of hydrochloric acid
and
excess magnesium ribbon
(a) Aiko uses the equipment labelled X to measure the volume of gas made in the reaction.
Write down the name of equipment X.
[1]
(b) Aiko collects 35 cm3 of gas in 5 minutes.
Aiko wants to find out what happens when the concentration of acid is increased.
Aiko doubles the concentration of acid she uses and repeats the experiment.
(i) Predict the volume of gas she collects in 5 minutes.
cm3
Explain your answer.
[1]
(ii) Write down two variables she controls.
1
2
[2]
(c) Aiko wants to do a similar investigation with sodium and hydrochloric acid.
Explain why it would not be safe to use sodium.
[1]
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9
Look at the picture of a toad near a pond where it lives.
Humans also live near the pond.
(a) Toads reproduce by laying their eggs in water.
Suggest two ways human activities reduce the population of toads in the pond.
1
2
[2]
(b) Toads are vertebrates.
They have lungs and a moist skin.
Complete this sentence about toads.
Choose from the list.
amphibians
birds
fish
mammals
Toads belong to a group of vertebrates called
reptiles
.
[1]
(c) Complete this sentence about toads.
All the toads in the pond reproduce together to produce fertile offspring.
This means the toads in the pond all belong to the same
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.
[1]
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10 Blessy races four snails, A, B, C and D.
A
D
B
C
She draws a distance/time graph for each of the four snails.
distance
in cm
time
in minutes
(a) The distance of the race is 50 cm.
Which snail wins the race?
Circle the correct answer.
A
© UCLES 2021
B
C
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D
[1]
13
(b) Which snail does not move for part of the race?
Circle the correct answer.
A
B
C
D
[1]
(c) Which snail moves the fastest between 1 minute and 2 minutes?
Circle the correct answer.
A
B
C
D
[1]
(d) What is the average speed of snail D over 5 minutes?
Circle the correct answer.
4 cm / minute
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5 cm / minute
8 cm / minute
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40 cm / minute
[1]
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11 Complete these sentences about the structure of the Earth.
At the very centre of the Earth is the
.
This is surrounded by a layer of magma called the
On top of the magma is the Earth’s outer layer called the
.
.
[3]
12 The picture shows a fossil of a fish.
Fossils are often destroyed when metamorphic rock forms.
Explain why.
[1]
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Cambridge Lower Secondary Checkpoint

SCIENCE
1113/02
Paper 2
October 2021
45 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 should show all your working in the booklet.
• You may use a calculator.
INFORMATION
• The total mark for this paper is 50.
• The number of marks for each question or part question is shown in brackets [ ].
This document has 16 pages. Any blank pages are indicated.
IB21 10_1113_02/8RP
© UCLES 2021
[Turn over
2
1
This question is about cells, tissues and organs in plants and animals.
(a) Complete the table.
Tick () the box that describes each part.
part of plant
cell
tissue
organ
leaf
palisade mesophyll
root hair
[2]
(b) Complete the table.
Tick () the box that describes each part.
part of animal
cell
tissue
organ
sperm
stomach
heart
[2]
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3
2
This question is about elements and compounds.
(a) Match the name of the element to its correct chemical symbol.
element
chemical symbol
B
beryllium
Be
boron
Br
[1]
(b) Look at the formula of this compound.
NaCl
The compound contains two elements.
One element is chlorine.
Write down the name of the other element.
[1]
(c) Look at the formula of this compound.
CaO
What type of compound is CaO?
Circle the correct answer.
carbonate
hydroxide
oxide
sulfate
[1]
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3
This question is about energy transfer processes.
(a) Draw a line from each method of energy transfer to its example.
method of energy transfer
example
The way the air above a heater
becomes warm.
radiation
The way energy from the Sun
reaches the Earth.
convection
The way the metal handle of a
cooking pot gets hot.
[1]
(b) The diagram shows a copper rod being heated.
Explain how heat is transferred through the copper rod.
Use ideas about particles in your answer.
[3]
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4
Weeds reduce the growth of crops.
Rajiv is testing a new weed killer to reduce the number of weeds.
He wants to find the correct concentration of weed killer to kill weed seedlings.
He uses cotton wool soaked in weed killer solution.
The cotton wool is placed in a dish containing some weed seedlings.
weed seedlings
dish
cotton wool soaked
in weed killer solution
Rajiv does five different experiments.
In each experiment he uses a different concentration of weed killer solution.
(a) (i) State one variable he changes in each experiment.
[1]
(ii) State two variables he controls in each experiment.
1
2
[2]
(iii) State two variables he measures in each experiment.
1
2
[2]
(b) Suggest why Rajiv washes his hands after handling the cotton wool soaked in weed killer.
[1]
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5
Priya has two magnets.
N
S
N
bar magnet
S
horseshoe magnet
(a) Priya dips the bar magnet into iron filings.
Where will most of the iron filings stick to the magnet?
Explain your answer.
[2]
(b) Look at the horseshoe magnet.
Put an X on the diagram to show where the magnetic field is strongest.
[1]
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(c) Which pattern shows the magnetic field lines of a bar magnet?
N
S
N
A
N
S
B
S
N
C
S
D
Choose from A, B, C or D.
answer
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[1]
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6
Carlos investigates the pH of some liquids.
Some of the liquids are very acidic and some are very alkaline.
(a) Describe how Carlos measures the pH of the liquids.
[1]
(b) Some of the liquids are dangerous to use.
Write down one safety precaution Carlos takes during his investigation.
Explain why this safety precaution is needed.
[2]
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7
Mike owns a group of sheep that he uses to produce wool.
He wants to increase the amount of wool his sheep produce.
He mates his female sheep with a different variety of male sheep.
(a) What term describes this way of producing a new variety of sheep?
[1]
(b) The diagram shows Mike’s female sheep and three different varieties of male sheep.
female sheep
male A
male B
male C
Which one of the three varieties of male sheep should Mike mate with his female sheep to
increase the amount of wool his sheep produce?
Give a reason for your answer.
variety
reason
[1]
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8
Look at the model of a carbon atom.
particle X
proton
particle Y
(a) Write down the name of:
particle X
particle Y
[2]
(b) Circle the name of the scientist who suggested a model for an atom.
Copernicus
Galileo
Newton
Pasteur
Rutherford
[1]
(c) The diagram shows part of the Periodic Table.
1
H
3
Li
11
Na
19
K
4
Be
12
Mg
20
Ca
5
B
13
Al
6
C
14
Si
7
N
15
P
8
O
16
S
9
F
17
Cl
2
He
10
Ne
18
Ar
(i) Complete the sentence.
Carbon is in Period
of the Periodic Table.
[1]
(ii) Circle the element which has similar chemical properties to carbon.
Ar
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Al
B
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Li
Si
[1]
11
9
Look at the diagrams of some sound waves.
A
B
C
D
You can use each letter once, more than once, or not at all.
(a) Which wave has the highest frequency?
[1]
(b) Which wave shows the quietest sound?
[1]
(c) Which wave shows the lowest pitch?
[1]
(d) Which two waves have the same amplitude?
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and
[1]
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10 During breathing, air passes into the alveoli (air sacs) of the lungs, and is then released back into
the atmosphere.
Look at the table.
It shows the composition of inhaled air (air we breathe in) and exhaled air (air we breathe out).
gas
carbon dioxide
percentage in inhaled air
0.04
percentage in exhaled air
4
nitrogen and other gases
80
80
oxygen
20
16
(a) Describe the differences between the composition of inhaled air and exhaled air.
[2]
(b) Explain what happens in the alveoli to cause these differences between inhaled and
exhaled air.
[2]
(c) Air enters the human respiratory system through the nose and nasal cavity.
Write down two other parts that inhaled air moves through before it reaches the alveoli.
and
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[1]
13
11 The table describes the reaction of some metals with cold dilute acid and cold water.
reaction with
cold dilute acid
reaction with
cold water
potassium
reacts violently
reacts very rapidly
lithium
reacts violently
reacts very rapidly
calcium
reacts violently
reacts very rapidly
magnesium
reacts rapidly
extremely slow
reaction
metal X
reacts slowly
no reaction
copper
no reaction
no reaction
gold
no reaction
no reaction
metal
Use information from the table to answer these questions.
(a) Explain how you can tell that magnesium reacts faster with cold dilute acid than with cold
water.
[1]
(b) Suggest the name of metal X.
[1]
(c) Potassium reacts with cold water to make a colourless gas and an alkaline solution.
Write the name of the:
colourless gas
alkaline solution
[2]
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12 Complete the table to show the colour each object appears in different colours of light.
colour of light
colour of object
white
red
green
green
blue
red
colour the object appears
[2]
13 Blessy uses pure white light to produce a spectrum of colours.
equipment X
red
orange
yellow
green
blue
indigo
violet
white light
(a) What is the name of the process that splits white light into a spectrum of colours?
[1]
(b) Write down the name of equipment X.
[1]
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14 Look at the list of energy sources.
Tick () the two renewable energy sources.
coal
hydroelectric
oil
natural gas
solar
[2]
© UCLES 2021
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Cambridge Lower Secondary Checkpoint

SCIENCE
1113/01
Paper 1
April 2021
45 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 should show all your working in the booklet.
• You may use a calculator.
INFORMATION
• The total mark for this paper is 50.
• The number of marks for each question or part question is shown in brackets [ ].
This document has 20 pages. Any blank pages are indicated.
IB21 05_1113_01/6RP
© UCLES 2021
[Turn over
2
1
Look at the diagram. It shows part of the alimentary canal.
A
B
C
E
D
(a) Where is acid added to the alimentary canal?
Circle the correct answer.
A
B
C
D
E
[1]
(b) Where is digested food absorbed from the alimentary canal into the blood?
Circle the correct answer.
A
B
C
D
E
[1]
(c) Look at the part labelled A on the diagram.
Write down the names of the two parts of the alimentary canal that part A connects.
and
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[1]
3
2
Look at the descriptions of three rocks, A, B and C.
Rock A is formed in layers. It is soft and contains fossils.
Rock B is made when molten rock cools. It is hard and contains crystals.
Rock C is very hard. It contains distorted fossils due to high temperatures and high pressures.
(a) Complete the sentences to name each type of rock.
Choose from the list.
igneous
metamorphic
Rock A is
rock.
Rock B is
rock.
Rock C is
rock.
sedimentary
[2]
(b) Describe how sedimentary rock is formed.
[2]
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3
Some objects in the Universe are seen because they emit light.
Other objects are seen because they reflect light.
(a) Tick () the boxes next to the objects that emit light.
Jupiter
Mars
the Sun
North Star
the Earth’s Moon
[2]
(b) Which scientist first suggested that the planets in our Solar System orbit the Sun?
Circle the correct answer.
Copernicus
Darwin
Galileo
Rutherford
[1]
Venus
[1]
(c) Which of these planets is closest to the Sun?
Circle the correct answer.
Earth
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Jupiter
Neptune
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5
4
The diagram shows the shells of five molluscs labelled A, B, C, D and E.
A
B
C
E
D
NOT TO SCALE
Use the key to identify the scientific names of the five molluscs.
shell consists of one single part
go to 2
shell consists of two parts
go to 3
shell is spiral-shaped
mollusc is Buccinum
shell is not spiral-shaped
mollusc is Patella
shell is long and thin
mollusc is Ensis
shell is not long and thin
go to 4
shell has a small tuft of hairs
mollusc is Mytilus
shell does not have a small tuft of hairs
mollusc is Ostrea
1
2
3
4
Write your answers in the table.
scientific name
letter
Buccinum
Ensis
Mytilus
Ostrea
Patella
[2]
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5
The diagram shows part of the Periodic Table.
2
He
1
H
3
Li
4
Be
5
B
6
C
7
N
8
O
9
F
10
Ne
11
Na
12
Mg
13
Al
14
Si
15
P
16
S
17
Cl
18
Ar
19
K
20
Ca
The number above each chemical symbol shows the number of protons in the atom.
(a) How many protons are there in an atom of sodium?
[1]
(b) How many electrons are there in an atom of oxygen?
[1]
(c) Look at the diagram of an atom.
.....................................
.....................................
.....................................
(i) Write down the chemical symbol for this atom.
[1]
(ii) Label the diagram.
Choose from the list.
electron
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neutron
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proton
[1]
7
6
Blessy has two sound wave oscilloscope traces.
trace A
trace B
(a) Circle the correct answers.
Which trace has the higher pitch?
trace A
trace B
they have the same pitch
Which trace has the lower frequency?
trace A
trace B
they have the same frequency
trace B
they have the same loudness
Which trace is louder?
trace A
Which trace has the lower amplitude?
trace A
trace B
they have the same amplitude
[3]
(b) Sound waves are produced by a vibrating object.
What does the vibrating object do to the air particles around it?
[1]
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7
Look at the diagram of four different varieties of the same species of chicken.
A
B
C
D
A farmer uses selective breeding to produce a new variety of chicken.
This new variety of chicken must be black with white spots and have a large tail.
Describe two stages in the production of this new variety of chicken.
1
2
[2]
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9
Question 8 starts on the next page.
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8
Carlos investigates the reaction between magnesium and hydrochloric acid.
Look at the diagram. It shows the apparatus he uses.
Carlos measures the total volume of gas made every 30 seconds.
(a) Look at the diagram of the gas syringe below.
10
20
30
40
50
60
70
80
90 100 cm3
What is the volume of gas in the gas syringe?
cm3 [1]
(b) Carlos decides to repeat his experiment.
Suggest why it is a good idea to repeat the experiment.
[1]
(c) The hydrochloric acid in the experiment is corrosive.
Describe how Carlos controls this safety risk.
[1]
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(d) Look at his results.
time in seconds
total volume of gas in cm3
0
0
30
20
60
35
90
44
120
50
150
50
Circle the best way for Carlos to present his results.
bar graph
line graph
pie chart
scatter graph
[1]
(e) The total volume of gas made depends on the concentration of acid.
Carlos wants to do an experiment that makes about 100 cm3 of gas.
Describe how he decides the correct concentration of acid to use.
[1]
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9
Mike has four copper containers.
He puts water into each container.
He puts all the containers in a classroom at 20 °C for 10 minutes.
A
B
C
D
Mike draws this table about the containers.
container
outside surface of
container
volume of water
in cm3
temperature of
water at start
in °C
A
dull
100
60
B
shiny
100
60
C
dull
100
70
D
dull
100
60
(a) Mike compares container A with container B.
The water cools faster in A than in B.
(i) Complete the sentence.
The difference between the two containers is
.
[1]
(ii) Complete the sentence.
Choose from the list.
boiler
conductor
freezer
radiator
The water cools faster in container A because the container is a better
.
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(b) Mike compares container C with container A.
The water cools faster in C than in A.
Why does the water cool faster in C than in A?
[1]
(c) Mike compares container D with container A.
The water cools faster in D than in A.
Suggest why.
[1]
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14
10 Look at the picture of an elephant.
large ears
tusk
trunk
(a) Elephants are adapted to survive.
Draw a line to match each adaptation with the reason why it helps the elephant survive.
adaptation
reason
large ears
pull grass from ground
trunk
keep elephant cool
tusks
used to fight other
elephants
[1]
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(b) The chart shows the population of elephants in different parts of Africa in 1981 and 1989.
500
400
1981
300
population of
elephants
in thousands 200
1989
100
0
West Africa
East Africa
South Africa Central Africa
location
(i) In which part of Africa was the largest decrease in the population of elephants between
1981 and 1989?
[1]
(ii) Humans caused the changes in elephant populations between 1981 and 1989.
Suggest two ways humans caused these changes.
1
2
[2]
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11 Look at the diagrams. They show the arrangement of particles in solids, liquids and gases.
Look at the statements about solids, liquids and gases.
A
are usually hard
B
take the shape of the container they are put into
C
can be compressed (squashed)
D
completely fill any container they are put into
E
have a fixed shape
F
cannot flow easily
(a) Complete the table by putting the letter for each statement into the correct column.
One letter has been done for you.
solids
liquids
gases
B
[3]
(b) Liquids can evaporate.
Explain what happens to the particles in a liquid during evaporation.
[2]
© UCLES 2021
1113/01/A/M/21
17
12 The diagram shows part of a flower that is pollinated by bees.
stigma
anther
anther
petal
The male and female parts of the flower are protected by petals.
(a) Write down one other function of the petals.
[1]
(b) Write down one function of the anther.
[1]
(c) The diagram shows a bee pollinating this flower.
(i) Describe what happens during pollination.
[1]
(ii) Describe what happens after pollination.
[2]
© UCLES 2021
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18
13 Mia is a dancer.
The force she exerts on the floor is 500 N.
(a) She stands with both feet flat on the floor.
force = 500 N
The area of her shoes in contact with the floor is 400 cm2.
Calculate the pressure she exerts on the floor.
pressure
© UCLES 2021
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N / cm2
[2]
19
(b) Mia stands on the points of her feet.
Her new area of contact with the floor is 10 cm2 rather than 400 cm2.
force = 500 N
Describe what happens to the pressure she exerts on the floor.
[1]
(c) Mia balances on one point.
force = 500 N
She cannot remain on one point for a long time because it may damage her toes.
Suggest why this may damage her toes.
[1]
© UCLES 2021
1113/01/A/M/21
Cambridge Lower Secondary Checkpoint

SCIENCE
1113/02
Paper 2
April 2021
45 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 should show all your working in the booklet.
• You may use a calculator.
INFORMATION
• The total mark for this paper is 50.
• The number of marks for each question or part question is shown in brackets [ ].
This document has 16 pages.
IB21 05_1113_02/7RP
© UCLES 2021
[Turn over
2
1
Yuri draws a picture of a fungus living near some trees.
After three days he draws another picture of the same fungus.
Look at these two pictures.
day 1
day 4
(a) The pictures show evidence that this fungus is a living organism.
What is this evidence?
[1]
(b) Yuri’s teacher says that there are more characteristics of living organisms.
Write down three other characteristics of living organisms.
1
2
3
[3]
© UCLES 2021
1113/02/A/M/21
3
2
These varieties of cat belong to the same species.
Siamese cat
Manx cat
(a) Complete this definition of a species.
Animals that belong to the same species are able to
to produce
together
offspring.
[2]
(b) Siamese cats and Manx cats show variation within a species.
Describe two differences, shown in the diagram, between Siamese cats and Manx cats.
1
2
[2]
© UCLES 2021
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4
3
This question is about different types of chemical reaction.
(a) Complete the sentences.
Choose from the list.
combustion
displacement
neutralisation
respiration
(i) Burning a fuel in air is called
rusting
.
[1]
(ii) The reaction between an acid and an alkali is called
.
[1]
(b) Complete the word equation for the reaction between calcium carbonate and hydrochloric acid.
calcium
carbonate
+
hydrochloric
acid
calcium
chloride
+
+
[2]
© UCLES 2021
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5
4
Look at the diagram. It shows white light being split into different colours.
te
w hi
li gh
t
Complete the sentences.
Choose from the list.
dispersion
prism
eight
reflection
seven
filter
mirror
refraction
six
When white light enters a
screen
spectrum
it is split into
different colours.
This process is known as
.
The different colours are known as the colours of the
.
[4]
© UCLES 2021
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6
5
This question is about elements, compounds and mixtures.
(a) Look at the boxes. They show the particles in some substances.
A
B
C
D
Which box shows a mixture of two elements?
Circle the correct answer.
A
B
C
D
[1]
(b) A compound is made of only sodium and chlorine.
What is the name of this compound?
[1]
© UCLES 2021
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7
6
Mia measures the current in different electrical circuits.
(a) Write down the name of the piece of equipment used to measure current.
[1]
(b) Mia connects an electrical circuit with one cell and two lamps.
A1
A3
0.125 A
A2
The reading on A1 is 0.125 A.
Write down the two missing readings.
The reading on A2 is
A.
The reading on A3 is
A.
[1]
(c) Mia connects three more circuits using the same size cells and lamps.
A4
0.25 A
A6
A5
The reading on A4 is 0.25 A.
Write down the two missing readings.
The reading on A5 is
A.
The reading on A6 is
A.
[2]
© UCLES 2021
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8
7
Chen measures the pulse rate of his friends before and after exercise.
All the friends do the same amount and level of exercise.
Here are his results.
friend
pulse rate before exercise
in beats per minute
pulse rate after exercise
in beats per minute
Carlos
74
104
Mike
72
105
Oliver
69
98
change in pulse rate
in beats per minute
(a) Calculate the change in pulse rate for each friend.
Write your answers in the table.
[1]
(b) Are Chen's results reliable?
Yes
No
Explain your answer.
[1]
(c) Chen makes this statement.
‘Mike is the fittest boy in my school.’
Write down two reasons why Chen's statement is not correct.
1
2
[2]
© UCLES 2021
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9
8
Look at the diagram. It shows solutions being mixed in a plastic cup.
thermometer
lid
plastic
cup
mixture of
solutions
Look at the table. It shows the results of five experiments.
experiment
temperature before
mixing solutions
in °C
temperature after
mixing solutions
in °C
A
15
26
B
15
10
C
15
15
D
15
32
E
15
27
(a) (i) Which experiment transfers the most thermal (heat) energy into the solutions?
[1]
(ii) Complete the sentence.
The reaction in experiment
is endothermic because
. [1]
(b) Suggest a reason for the result in experiment C.
[1]
© UCLES 2021
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10
9
Priya measures the distance a swimmer moves every five seconds.
She investigates two different swimming styles.
She writes her results in a table.
distance in m
time in s
butterfly style
backstroke style
0.0
0.0
0.0
5.0
8.5
9.0
10.0
16.5
18.0
15.0
25.0
34.5
20.0
33.0
35.0
25.0
42.0
46.0
(a) One of the results is anomalous.
Circle the anomalous result in the table.
© UCLES 2021
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[1]
11
(b) (i) Complete the distance/time graph for the butterfly style:
• label the x-axis and y-axis
• plot the other three points
• draw a line of best fit.
50.0
40.0
30.0
.........................................
20.0
10.0
0
0
5.0
10.0
15.0
20.0
25.0
.........................................
[3]
(ii) Predict the distance the swimmer moved in the first 12 seconds.
m [1]
© UCLES 2021
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12
10 The diagram shows the heart of a human.
The darker grey shading shows oxygenated blood.
A
B
heart
C
D
Use the information in the diagram to match each letter with the correct description of the
blood vessel.
letter
description of the blood vessel
A
artery taking deoxygenated blood
to the lungs
B
artery taking oxygenated blood
to the body
C
vein taking deoxygenated blood
to the heart
D
vein taking oxygenated blood
to the heart
[3]
© UCLES 2021
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13
11 Look at the chemical symbols for four metals.
Cu
Zn
Na
Ca
Answer the questions.
Each chemical symbol can be used once, more than once or not at all.
(a) Which of the four metals is the most reactive?
[1]
(b) Which of the four metals does not react with water or dilute hydrochloric acid?
[1]
(c) Which of the four metals reacts slowly with dilute hydrochloric acid?
[1]
(d) Which of the four metals is lowest in the reactivity series?
[1]
© UCLES 2021
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14
12 Safia draws two pie charts to show the energy resource use in her country.
oil
natural gas
coal
nuclear
renewables
Year 2018
Year 2040
The pie chart for the year 2040 shows the predicted energy resource use.
The predicted natural gas use decreases from 2018 to 2040.
The predicted renewables use increases from 2018 to 2040.
(a) Describe two other changes in predicted energy resource use from 2018 to 2040.
1
2
[2]
(b) (i) Name one renewable energy resource.
[1]
(ii) Suggest why the renewable energy resource use is predicted to increase from 2018 to
2040.
[1]
© UCLES 2021
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15
13 Angelique investigates how quickly plants absorb water.
She uses the stem and leaves of a plant called celery.
She puts a stem of celery in a jar of coloured water.
After one hour she looks at the celery to see how much coloured water it has absorbed.
This is shown in the diagram.
leaves
coloured water
absorbed
celery stem
jar
coloured
water
at start
after one hour
(a) Suggest how Angelique measures the amount of coloured water the celery has absorbed.
[1]
(b) Angelique also investigates the effect of temperature on the absorption of water.
State two variables that Angelique controls in this investigation.
1
2
[2]
© UCLES 2021
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16
14 Carlos researches the solubility of different salts.
He finds this information on the internet.
All potassium
and sodium salts
are soluble
in water.
Most sulfates
are soluble in
water (except
barium, calcium
and lead).
Most chlorides
are soluble in
water (except lead
and silver).
All nitrates are
soluble in water.
Use the information to answer these questions.
(a) Write down the name of one insoluble sulfate.
[1]
(b) Look at the chemical formula of a salt.
KCl
Is the salt soluble?
Yes
No
Explain your answer.
[1]
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
1113/02/A/M/21
Cambridge Lower Secondary Checkpoint

SCIENCE
1113/01
Paper 1
October 2020
45 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 should show all your working in the booklet.
• You may use a calculator.
INFORMATION
• The total mark for this paper is 50.
• The number of marks for each question or part question is shown in brackets [ ].
This document has 20 pages. Blank pages are indicated.
IB20 10_1113_01/6RP
© UCLES 2020
[Turn over
2
1
Complete the crossword puzzle about cells.
1
2
3
4
5
Across
2 Which rigid structure surrounds a plant cell?
4 What is the name of a group of different tissues working together?
5 Which structure contains the genetic material in a cell?
Down
1 What is the name of the structure inside a cell where photosynthesis happens?
2 Where in a cell do most chemical reactions happen?
3 What is the name of a group of similar cells?
[4]
© UCLES 2020
1113/01/O/N/20
3
2
An oscilloscope displays sound waves.
(a) Draw a line to match each display to the correct change.
display
change
decrease in
frequency
decrease in
loudness
increase in
amplitude
increase in
pitch
[3]
(b) Tick () the correct sentence about the amplitude of sound.
A high-amplitude sound must be a high-frequency sound.
A high-amplitude sound must be a high-pitch sound.
A high-amplitude sound must be a loud sound.
A high-amplitude sound must be a low-frequency sound.
A high-amplitude sound must be a sound with a large wavelength.
[1]
© UCLES 2020
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4
3
Look at the diagram of a volcano.
smoke and ash
lava
main
vent
outer layer
of the Earth
magma
chamber
(a) Lava from the volcano cools down to make rock.
Which type of rock is made when lava cools down?
[1]
(b) Rock that forms from lava does not contain fossils.
Explain why.
[1]
(c) What is the name of the outer layer of the Earth?
Circle the correct answer.
crust
inner core
mantle
outer core
[1]
© UCLES 2020
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5
(d) The sentences are about the internal structure of the Earth.
Tick () the correct sentence.
The crust floats on the outer core.
The inner core is solid and the outer core is liquid.
The mantle is the coldest part of the Earth.
The outer core is the hottest part of the Earth.
[1]
© UCLES 2020
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6
4
The diagram shows a food web.
lion
jackal
wild
cat
goat
rabbit
grass
vole
(a) Which animals in this food web are eaten by the wild cat?
and
[1]
(b) Write a complete food chain that includes the goat and two other animals.
[1]
(c) The number of voles decreases.
Explain how this may affect the number of rabbits.
[1]
(d) Energy is lost from food webs.
Write down one way energy is lost from a food web.
[1]
© UCLES 2020
1113/01/O/N/20
7
5
The diagram shows some information about metals.
sodium
lithium
magnesium
react with
cold water
react with
acids
zinc
react with
oxygen
lead
copper
gold
(a) Use the diagram to answer these questions.
(i) Which metal reacts with oxygen but not acid?
[1]
(ii) Describe two ways in which the reactions of magnesium and zinc are similar.
[2]
(b) Sodium is placed in cold water. It reacts to form a gas.
What is the name of this gas?
[1]
© UCLES 2020
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8
6
Carlos investigates light.
(a) He shines blue light into a prism.
blue
light
prism
(i) Describe one thing that happens to the blue light.
[1]
(ii) Carlos changes the blue light to white light.
Describe one other thing that happens to the white light.
[1]
© UCLES 2020
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9
(b) Carlos shines light through different coloured filters onto different colours of a book.
coloured filter
light source
book
Complete his results table.
colour of light
colour of book
red
red
blue
red
red
magenta
colour of light reflected
into eye
[2]
© UCLES 2020
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7
Angelique’s pet mouse has baby mice.
Pierre says that grouping together helps the baby mice to keep warm.
Angelique suggests that they plan an investigation to test Pierre’s idea.
They use eight test-tubes filled with hot water to represent eight baby mice.
Angelique labels one tube A and stands it on its own.
She labels another tube B and places it in the middle of six other tubes all labelled C.
tube B
tube A
tube C
Pierre and Angelique obtain these results.
time in minutes
0
1
2
3
4
5
temperature of water in tube A in oC
73
62
54
38
42
40
temperature of water in tube B in oC
73
68
65
62
58
57
temperature of water in tube C in oC
73
65
59
54
49
47
© UCLES 2020
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11
(a) Describe two patterns shown by these results.
1
2
[2]
(b) Describe how these results could be displayed to make these patterns more obvious.
[1]
(c) Angelique says that one result is anomalous.
Which result is anomalous?
tube
time
minutes
Explain how you know the result is anomalous.
[2]
(d) Baby mice do not have fur.
Angelique thinks that mice lose less heat when they grow fur.
Describe an investigation, using test-tubes of hot water, to see if Angelique’s idea is correct.
[2]
© UCLES 2020
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8
The diagram shows molecules in a mixture.
(a) Tick () the box next to the correct statement about the mixture.
mixture of four elements
mixture of four compounds
mixture of two elements and two compounds
mixture of one element and three compounds
[1]
(b) Molecules are made of atoms.
Atoms are made of three types of particles.
(i) Electrons are one of these types of particles.
What are the two other types of particles in an atom?
and
[2]
(ii) Which scientist suggested a model for the atom?
Circle the correct answer.
Copernicus
Darwin
Galileo
Rutherford
[1]
© UCLES 2020
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13
9
Rajiv investigates the speed of a block of wood moving down a slope.
Here is his prediction.
‘I predict that the higher the slope, the faster the block of wood moves.’
Here are his results.
low slope
high slope
block of
wood
time
in seconds
distance travelled
by block in metres
time
in seconds
distance travelled
by block in metres
4
1.00
4
2.00
(a) Is Rajiv’s prediction true?
...........................................
Use Rajiv’s results to explain your answer.
[2]
(b) What two pieces of equipment does Rajiv need for the measurements he makes?
1
2
[1]
(c) He uses 4 seconds for both experiments.
What two other things are kept the same in his investigation to make it a fair test?
1
2
[2]
© UCLES 2020
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14
10 The picture shows a diver wearing breathing apparatus.
(a) The cylinder on his back is filled with gas.
The gas contains an element that the diver needs to survive under water.
Name this element.
[1]
(b) Gaseous exchange takes place in his lungs.
Explain what is meant by the term gaseous exchange.
[1]
© UCLES 2020
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15
11 Jamila builds this electrical circuit.
switch 1
direction
of
current
switch 2
X
A
switch 3
Y
(a) What type of electrical circuit is this?
Circle the correct answer.
electrostatic
magnetic
parallel
series
[1]
(b) Jamila wants to turn lamp X on but leave lamp Y off.
What must she do?
[1]
(c) Jamila wants to turn lamp Y on but leave lamp X off.
What must she do?
[1]
(d) Jamila closes all the switches.
What happens to the current at point A?
[1]
© UCLES 2020
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16
12 Ahmed investigates the reaction between magnesium lumps and dilute hydrochloric acid.
Look at the diagram. It shows the apparatus he uses.
gas syringe
dilute
hydrochloric acid
magnesium
lump
Look at the graph of Ahmed’s results.
120
110
100
90
80
total
volume of
hydrogen
given off
in cm3
70
60
50
40
30
20
10
0
0
10
20
30
40
50
60
70
80
90
100
time in seconds
(a) How long (in seconds) does it take to make 50 cm3 of hydrogen?
seconds
© UCLES 2020
[1]
1113/01/O/N/20
17
(b) Ahmed repeats the experiment with magnesium powder.
Predict what will happen to the rate of the reaction.
Explain why.
[3]
© UCLES 2020
1113/01/O/N/20
Cambridge Lower Secondary Checkpoint

SCIENCE
1113/02
Paper 2
October 2020
45 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 should show all your working in the booklet.
• You may use a calculator.
INFORMATION
• The total mark for this paper is 50.
• The number of marks for each question or part question is shown in brackets [ ].
This document has 16 pages. Blank pages are indicated.
IB20 10_1113_02/8RP
© UCLES 2020
[Turn over
2
1
The diagrams A, B, C, D and E show five different invertebrate animals.
A
B
C
E
D
NOT TO SCALE
(a) (i) Which one of the animals is an insect?
Choose from A, B, C, D or E.
Give a reason for your answer.
[1]
(ii) Which one of the animals is an arachnid?
Choose from A, B, C, D or E.
Give a reason for your answer.
[1]
(b) Which one of the animals is not an arthropod?
Choose from A, B, C, D or E.
Give a reason for your answer.
[1]
© UCLES 2020
1113/02/O/N/20
3
2
This question is about the three states of matter.
(a) A gas is blown into a balloon. The balloon changes shape.
Why does the balloon change shape?
Tick () the box next to the correct answer.
The particles of the gas expand to fill the space.
The particles of the gas get bigger.
The particles of the gas hit the surface of the balloon more often.
The particles of the gas slow down.
[1]
(b) Rajiv investigates the cooling curve of a substance.
He measures the temperature of a hot liquid every minute.
The graph shows his results.
90
80
70
60
temperature
in °C
50
40
30
20
10
0
0
1
2 3 4 5 6
time in minutes
7
8
(i) What is the temperature of the hot liquid at the start?
°C
[1]
(ii) Name the process that happens when a liquid changes into a solid.
[1]
(iii) At what temperature does the liquid change into a solid?
°C
© UCLES 2020
1113/02/O/N/20
[1]
[Turn over
4
3
Complete the sentences about thermal (heat) energy transfer.
Choose words from the list.
conduction
convection
radiation
Thermal (heat) energy can be transferred from one place to another place.
When particles are involved, the processes are
and
.
When electromagnetic waves are involved, the process is
.
[2]
4
Look at the list of different energy sources.
wood
sugar
coal
crude oil
(petroleum)
OIL
OIL
OIL
OIL
LPG
GAS
propane
(LPG)
sunflower oil
Which three of these energy sources are non-renewable?
1
2
3
[1]
© UCLES 2020
1113/02/O/N/20
5
5
Complete the sentences about changes that happen in the human body during adolescence.
Choose words or phrases from the list.
at the same time as
body hair
breasts
earlier than
enzymes
hormones
later than
proteins
During adolescence, the human body begins to change.
Both sexes begin to grow
.
This is due to the increased amount of
made by the sex organs.
On average, females become sexually mature
males.
[3]
6
Chen investigates some reactions.
He measures the temperature of the reactants at the start of the reaction.
He measures the temperature of the products at the end of the reaction.
Look at his results.
reaction
temperature at
start
in °C
temperature at
end
in °C
temperature
change
in °C
type of reaction
A
20
15
−5
endothermic
B
20
30
C
15
30
D
25
15
(a) Complete the table.
[2]
(b) Which reaction has the greatest energy change?
Explain how you know.
[2]
© UCLES 2020
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6
7
Mia and Blessy sit on a balanced seesaw.
1.0 m
1.5 m
Blessy
Mia
Blessy has a weight of 400 N.
Calculate the weight of Mia.
weight of Mia
© UCLES 2020
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N
[2]
7
8
Some plants live in dry places where there is very little rainfall.
(a) These plants often have a large network of roots.
Describe two different functions of roots.
1
2
[2]
(b) When it is dry, resurrection plants are rolled up.
In wet conditions, resurrection plants unroll and flatten out.
This exposes the plant’s leaves and reproductive organs.
leaves
reproductive
organs
Explain why these changes are important to the resurrection plant’s survival.
(i) Unrolling to expose its leaves.
[2]
(ii) Unrolling to expose its reproductive organs.
[2]
© UCLES 2020
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8
9
Lily investigates the boiling points of some liquids.
(a) She uses a Bunsen burner to heat 20 cm3 of each liquid in a beaker.
Which equipment should Lily use to measure the boiling point of the liquid?
[1]
(b) Write down one safety precaution that Lily should take.
[1]
© UCLES 2020
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9
10 Mike explains that different materials have different densities.
He says,
‘Materials that are less dense than water will float.
Water has a density of 1 g / cm3.’
He finds out the densities of different materials.
material
density in g / cm3
gold
19.3
plastic
1.05
pumice stone
0.251
silver
10.5
wood
0.715
(a) Predict which two materials will float.
Choose from the table.
and
[1]
(b) Mike collects some water from the sea.
He tries to float the materials from the table in the seawater.
Now three of these materials float.
Use information from the table to explain why.
[2]
© UCLES 2020
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10
11 The seeds of cereal plants provide food for humans.
The diagram shows five varieties of a cereal plant.
A
B
C
produces lots of seeds
small leaves
does not need much water
D
long stems
E
shallow roots
Scientists want to produce a new variety of this cereal plant.
This cereal plant must:
• provide lots of food
• survive in dry conditions.
(a) Which two plants should the scientists use to produce the new variety of cereal plant?
Choose from A, B, C, D, and E.
and
[1]
(b) Describe what the scientists do to produce the new variety.
[2]
(c) Name the process scientists use to produce new varieties of plants and animals.
[1]
© UCLES 2020
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11
12 Look at the picture of an iron pipe.
The iron has reacted with water and a gas in the air to form hydrated iron oxide.
(a) What word describes this reaction?
[1]
(b) Which gas in the air reacts with the iron?
[1]
(c) This reaction is not useful.
Explain why.
[1]
© UCLES 2020
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12
13 Safia finds information about renewable energy resources used in a country for the years 2012
and 2014.
year 2014
year 2012
geothermal
wind
solar
geothermal
solar
wind
biomass
biomass
hydroelectric
hydroelectric
(a) Estimate the percentage of renewable energy provided by biomass in 2012.
%
[1]
(b) The percentage of the renewable energy resources used changed from 2012 to 2014.
Which percentage increased the most?
Circle the correct answer.
biomass
geothermal
hydroelectric
solar
wind
[1]
(c) The energy needs of the world are increasing.
Why is it important to develop renewable energy resources?
[1]
© UCLES 2020
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13
14 Look at the diagram.
It shows part of the Periodic Table.
H
He
Li
Be
B
C
N
O
F
Ne
Na
Mg
Al
Si
P
S
Cl
Ar
K
Ca
transition elements
(a) Write down the chemical symbol of an element in the same group as chlorine.
[1]
(b) Write down the chemical symbol of an element in the same period as sodium.
[1]
(c) Write down the chemical symbol of the element with an atom with only 8 protons.
[1]
(d) Complete the diagram to show the electronic structure of lithium, Li.
[1]
© UCLES 2020
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14
15 The boxes show some ideas about the Solar System.
(a) Match each idea to the correct scientist.
Draw only two lines.
ideas
scientist
Galileo
The first scientist to suggest that the planets
orbited the Sun.
Rutherford
Copernicus
Built a telescope and looked at Jupiter and its
moons. This showed that everything does not
rotate around the Earth.
Pasteur
Darwin
[2]
(b) Here is a list of bodies found in the Solar System.
Earth
Mars
Moon
Sun
Which one of these bodies is visible because it emits light?
[1]
(c) Which two of these bodies are visible because they reflect light?
Mars
Moon
North Star
and
© UCLES 2020
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Sun
[1]
15
16 Aiko and Oliver investigate thermal (heat) energy.
They heat a copper rod covered in wax.
Here is the apparatus they use.
copper rod
covered in wax
wood peg
paper clips in
the wax
heat
wood block
wood bench
When the copper rod is hot, the wax melts and the paper clips fall onto the bench.
(a) Aiko removes the copper rod. Oliver tells her to be careful.
Complete the sentences.
Aiko must be careful because
.
When she removes the copper rod, she uses
.
[1]
(b) Here are the results.
distance of paper clip from heat
in cm
time for paper clip to fall
in seconds
6
3.2
7
4.3
8
5.4
9
6.6
10
7.9
Aiko says it is a good idea to repeat the experiment.
Explain why this is a good idea.
[1]
© UCLES 2020
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Cambridge Lower Secondary Checkpoint

SCIENCE
1113/01
Paper 1
April 2020
45 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 should show all your working in the booklet.
 You may use a calculator.
INFORMATION
 The total mark for this paper is 50.
 The number of marks for each question or part question is shown in brackets [ ].
This document has 20 pages. Blank pages are indicated.
IB20 05_1113_01/3RP
© UCLES 2020
[Turn over
2
1
The list contains the names of different parts of a cell.
cell membrane
cell wall
chloroplast
Complete the table by placing ticks () in the correct boxes.
where the part of the cell is found
part of a cell
only in animal
cells
only in plant
cells
in both animal
and plant cells
cell membrane
cell wall
chloroplast
[2]
2
This question is about the properties of metals.
(a) Draw straight lines to match the property of a metal with its correct use linked to that
property.
property of a metal
use
drill bit
sonorous
bridge across a river
strong
electrical wires
ductile
bell
hard
[2]
© UCLES 2020
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3
(b) Metals are used to make electrical wires because they conduct electricity.
plastic
metal
Write down two reasons why plastic is put around electrical wires.
1
2
[2]
(c) Read the sentences about the physical properties of metals.
Tick () the box next to the correct sentence.
All metals have low melting points.
Some metals are gases at room temperature.
All metals conduct heat.
All metals are brittle.
[1]
© UCLES 2020
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4
3
Blessy uses the internet to find out about our Solar System.
She finds a very old model of our Solar System.
Jupiter
Mercury
Mars
orbits
Earth
Moon
Venus
Sun
Saturn
Scientists thought that the Earth was at the centre.
The orbits in the old model show the other objects moving around the Earth.
(a) Scientists today know that the Earth is not at the centre of our Solar System.
What is at the centre of our Solar System?
[1]
(b) Write down two other things that are incorrect in the old model.
1
2
[2]
(c) Write down one thing that is correct in the old model.
[1]
© UCLES 2020
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5
4
This question is about blood vessels.
(a) Draw a straight line from each cross section of a blood vessel to the correct letter showing
where the blood vessel is found.
blood vessels
cross sections
of blood vessels
A
from heart
direction
of blood flow
B
C
to heart
[2]
(b) Name the types of blood vessel labelled A and C.
A
C
[2]
© UCLES 2020
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6
5
The picture shows three different elements and their state at room temperature.
solid iodine
liquid bromine
chlorine gas
(a) Which two of these elements flow easily at room temperature?
[1]
(b) What is the chemical symbol for chlorine?
[1]
(c) Chlorine gas fills the jar.
Explain why a gas fills a jar.
Tick () the box next to the correct explanation.
Forces between the particles push them apart.



The particles are free to move.
The particles can easily be squashed into a small space.
The particles increase in size to fill the space.




[1]
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7
(d) Liquid bromine easily evaporates.
Explain what happens to the particles (molecules) when a liquid evaporates.
[2]
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8
6
Mia investigates sound.
oscilloscope
loudspeaker
microphone
She makes a sound using a loudspeaker.
The sound is detected by the microphone.
(a) Describe how the sound travels from the loudspeaker to the microphone.
[2]
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9
(b) Mia draws the wave she sees on the oscilloscope.
(i) She makes the sound louder.
Draw this wave on the oscilloscope.
[1]
(ii) She makes the sound a higher pitch.
Draw this wave on the oscilloscope.
[1]
© UCLES 2020
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10
7
This question is about the life cycle of a plant.
(a) These processes take place in the life cycle of a plant.
fertilisation
pollination
seed formation
seed germination
Put the processes in the order in which they occur in the life cycle of a plant.
One has been done for you.
seed
germination
....................
....................
....................
[1]
(b) The diagrams A and B show two different types of seed.
A
B
Suggest the method of dispersal for each type of seed.
Give a reason for each answer.
method of seed dispersal
reason
A
B
[2]
© UCLES 2020
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11
8
Look at the diagram of the structure of a lithium atom.
nucleus
(a) There are three electrons in a lithium atom.
(i) How many protons are there in a lithium atom?
[1]
(ii) How many neutrons are there in a lithium atom?
[1]
(b) A sodium atom contains 11 protons.
Draw the structure of a sodium atom.
[2]
© UCLES 2020
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12
9
Mike investigates the strength of magnets.
magnet
hand
paper clip
Mike

puts the magnet on top of his hand

puts the bottom of his hand onto 24 paper clips

lifts his hand up

counts how many paper clips have been attracted

repeats with different magnets.
Here are his results.
magnet
© UCLES 2020
number of paper clips
A
24
B
24
C
7
D
19
E
12
1113/01/A/M/20
13
(a)
Mike concludes that magnet A and magnet B are both strong.
He cannot conclude which of these two magnets is stronger.
(i) Explain why he cannot conclude which magnet, A or B, is stronger.
[1]
(ii) Describe what he could do to find out which magnet, A or B, is stronger.
[1]
(b) Pierre repeats Mike’s investigation.
Here are Pierre’s results.
magnet
number of paper clips
A
18
B
22
C
1
D
13
E
6
Pierre uses the same magnets as Mike.
Pierre uses the same paper clips as Mike.
The results are different.
(i) Describe one difference between the results.
[1]
(ii) Suggest why the results are different.
[1]
© UCLES 2020
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14
10 Egg white contains a protein.
An enzyme digests protein in the stomach.
Class 9 investigate how changing the pH affects the time it takes for the enzyme to digest egg
white.
The graph shows the results of their investigation.
10
9
8
7
6
time to
digest egg 5
white in
minutes 4
3
2
1
0
0
1
2
3
4
pH of mixture
5
6
(a) (i) Which pH has the shortest time of digestion?
pH
[1]
(ii) The class want to be certain that they have found the shortest time.
Describe two things the class does to be certain.
1
2
[2]
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15
(b) (i) State one safety risk of using liquids with a very low pH.
[1]
(ii) Describe one way of reducing this safety risk.
[1]
(c) State one variable the students must control in this investigation.
[1]
© UCLES 2020
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16
11 Jamila and Ahmed investigate displacement reactions.
They put drops of different solutions into the dimples of a spotting tile.
They then add metals to each solution.
The diagram shows their experiment.
zinc magnesium copper
metal
metal
metal
iron
metal
dimple
zinc nitrate
solution
magnesium nitrate
solution
Key
copper nitrate
solution
empty dimple
iron nitrate
solution
dimple with
metal and solution
spotting tile
(a) Jamila and Ahmed look to see if a reaction takes place.
Suggest what they might see if a reaction takes place.
[1]
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17
(b) They record their results in a table.
They put a


tick () if there is a reaction
cross (x) if there is no reaction.
Here are some of their results.
solution
metal
zinc
zinc nitrate
magnesium
copper
iron

x
x
magnesium nitrate
copper nitrate


iron nitrate



x
(i) Complete the table to predict the results for magnesium nitrate.
[1]
(ii) The reactivity series shows the metals in order of reactivity.
Which of the four metals is the lowest in the reactivity series?
[1]
© UCLES 2020
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18
12 Complete the light rays in the three diagrams.
(a)
reflection
mirror
normal
[1]
(b)
refraction
air
water
[1]
(c)
shadow formation
screen
light source
opaque
object
[2]
13 Complete the word equation for aerobic respiration.
glucose
+
....................
....................
....................
....................
+
....................
....................
[2]
© UCLES 2020
1113/01/A/M/20
Cambridge Lower Secondary Checkpoint

SCIENCE
1113/02
Paper 2
April 2020
45 minutes
You must answer on the question paper.
No additional materials are required.
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 should show all your working in the booklet.
 You may use a calculator.
INFORMATION
 The total mark for this paper is 50.
 The number of marks for each question or part question is shown in brackets [ ].
This document has 20 pages. Blank pages are indicated.
IB20 05_1113_02/3RP
© UCLES 2020
[Turn over
2
1
A farmer breeds goats for their milk.
(a) The farmer uses selective breeding.
These are the steps he uses.
They are in the wrong order.
A
He breeds the female goat with a male goat.
B
He repeats the steps for several generations.
C
He chooses a female goat that produces a lot of milk.
D
He breeds the female offspring with a male goat.
E
He chooses a female offspring that also produces a lot of milk.
Put the steps in the correct order.
One has been done for you.
E
[2]
(b) The characteristic the farmer chooses in his female goats is producing lots of milk.
Suggest one other characteristic the farmer wants in his goats.
[1]
© UCLES 2020
1113/02/A/M/20
3
(c) Natural selection is the way new varieties of animals form in the wild.
Which scientist developed the idea of natural selection?
Circle the correct answer.
Copernicus
Darwin
Galileo
Pasteur
Rutherford
[1]
© UCLES 2020
1113/02/A/M/20
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4
2
Aiko wants to increase the rate of reaction between sodium carbonate and dilute nitric acid.
(a) Match the way that she can do this to why it works.
Draw only two straight lines.
way
why it works
more crowded particles so more collisions
increase the
temperature of
nitric acid
particles have less energy so more collisions
particles move faster so more collisions
increase the
concentration of
nitric acid
has bigger particles so that there are more collisions
[2]
(b) Lumps of sodium carbonate react more slowly with dilute nitric acid than powdered sodium
carbonate.
Use ideas about collisions to explain why.
[2]
© UCLES 2020
1113/02/A/M/20
5
3
Chen and Yuri draw a distance / time graph for their journeys.
Chen
120
110
100
90
Yuri
80
70
distance
in metres
60
50
40
30
20
10
0
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18
time in seconds
Use the distance / time graph to answer the questions.
(a) How many metres did Chen move in the first 8 seconds?
(b) How many seconds did Yuri stop moving during his journey?
m
s
[1]
[1]
(c) Average speed can be calculated from the graph.
(i) Complete the equation for average speed.
average speed =
[1]
(ii) Calculate Yuri’s average speed during the whole journey.
m/s
Yuri’s average speed
© UCLES 2020
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[2]
[Turn over
6
4
(a) Look at the picture of a camel.
Camels live in hot dry deserts.
They have many adaptations to help them survive.
Complete the table to explain how a camel’s adaptations help it survive.
The first one has been done for you.
adaptation
explanation
fat in hump only
so that the rest of the body has less insulation
large flat feet
………………………………………………………….
thick eyelashes
………………………………………………………….
does not
produce sweat
………………………………………………………….
[3]
(b) Animals that live in the cold have different adaptations.
Suggest two adaptations that help animals survive in the cold.
1
2
[2]
© UCLES 2020
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7
5
Mike makes a salt called magnesium sulfate.
He adds magnesium to dilute sulfuric acid.
magnesium
ribbon
o o oo
dilute
sulfuric acid
He keeps adding magnesium to the dilute sulfuric acid until no more hydrogen gas is given off.
Some unreacted magnesium is left in the magnesium sulfate solution.
(a) Describe how Mike separates the unreacted magnesium from the magnesium sulfate
solution.
[1]
(b) Describe how Mike makes a dry sample of magnesium sulfate from magnesium sulfate
solution.
[1]
(c) Write a word equation for the reaction between magnesium and sulfuric acid.
+
+
[2]
© UCLES 2020
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8
6
Lily and Angelique use the internet to find this information about evaporation.
Evaporation can happen when liquids are hot or cold.
Evaporation is related to the energy of molecules.
The rate of evaporation can change.
rate of
evaporation
rate of
evaporation
air pressure
energy of molecules
(a) What happens to the rate of evaporation when the air pressure increases?
[1]
(b) (i) What happens to the rate of evaporation when the energy of molecules increases?
[1]
(ii) Write down one way the energy of molecules could be increased.
[1]
© UCLES 2020
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9
7
Water and minerals move through flowering plants.
(a) Complete the sentences about how water and minerals move through a plant.
Choose parts of a plant from the list.
Each part can be used once, more than once or not at all.
palisade mesophyll
phloem
root hair
Water and minerals enter plants through the
xylem
cells.
The water and mineral solution is transported in the stems through
cells.
The solution reaches the
cells in the leaves and
is used for growth.
[3]
(b) Plants need water to make sugar.
Name two other things that plants need to make sugar.
and
[2]
© UCLES 2020
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10
8
The diagram shows different types of rocks and how they form.
volcanic
eruption
igneous
rock
magma
sediment
rock X
sedimentary rock
(a) Sedimentary rocks can be turned into rock X by heat and pressure.
What type of rock is X?
[1]
(b) Which layer of the Earth contains magma?
Circle the correct answer.
atmosphere
inner core
mantle
outer core
[1]
(c) Sedimentary rocks often contain the remains of dead animals and plants from millions of
years ago.
What word is used to describe these remains?
[1]
© UCLES 2020
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11
(d)
Different types of soil have different amounts of organic matter in them.
Which type of soil contains the most organic matter?
Circle the correct answer.
clay
loam
sandy
silt
[1]
© UCLES 2020
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12
9
Sound can be reflected in the same way as light.
Safia and Yuri investigate the relationship between the angle of incidence, x, and the angle of
reflection, y.
They use the apparatus in the diagram.
board
x
tube A
10
11 12 1
9
8
7 6 5
y
tube B
2
3
4
ticking clock
sound
meter
board
Yuri

puts the ticking clock next to tube A

puts the sound meter next to tube B

uses the same value for angle x

uses different values of angle y.
Safia writes down the sound level shown on the sound meter.
Complete the table about the variables.
variable to change
variables to control
variable to measure
1.
………………………….…………….......
1.
value for x
2.
………………………….…………….......
3.
………………………….…………….......
1.
………………………….…………….......
[4]
© UCLES 2020
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13
10 Look at the diagrams of cells.
cheek cell
red blood cells
nerve cell
(a) Describe one way the structure of a nerve cell is different to a cheek cell.
[1]
(b) The structure of a red blood cell is adapted for its function.
Explain how.
function
adaptation
[2]
© UCLES 2020
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14
11 Mia investigates the temperature change during some reactions.
In each experiment Mia adds a solid to a liquid.
She measures the temperature of the liquid before and after adding the solid.
(a) Mia uses a measuring cylinder to measure the volume of liquid.
The diagram shows part of her measuring cylinder of liquid.
cm3
4
3
2
1
What is the volume of liquid in the measuring cylinder?
cm3
© UCLES 2020
[1]
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15
(b) Here are Mia’s results.
liquid
added
temperature
of
liquid
water
17
solid(s) added
temperature
of the liquid
after solid is
added
change in
temperature
copper sulfate
20
+3
is the reaction
exothermic
or
endothermic?
………….
water
17
copper
sulfate
solution
18
citric acid and sodium
hydrogencarbonate
14
zinc
22
………….
………….
………….
………….
(i) She does not include some important information in the headings of the table.
Which unit is missing from the headings?
[1]
(ii) Calculate the change in temperature for each experiment.
One has been done for you.
Write your answers in the table.
[1]
(iii) Complete the table by writing endothermic or exothermic in the last column.
© UCLES 2020
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[1]
[Turn over
16
12 Some objects become electrically charged.
(a) Oliver draws a diagram of two charged objects.
plastic rod
– –
–
– – –
– –
+
+
–
+
+
+ +
+
cloth
+
+
Explain how the objects become charged.
[2]
(b) Complete the sentences.
Opposite charges
.
Like charges
.
© UCLES 2020
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[1]
17
(c) Oliver puts charged balloons next to each other.
A
B
C
D
Balloon A has a positive charge.
What are the charges on the other balloons?
A is positive.
B is
.
C is
.
D is
.
[1]
13 Diagrams are used to show how energy is transferred.
Lamps transfer energy.
electrical energy = 100 J
...................energy = 10 J
thermal energy = 90 J
Complete the diagram to show the type of energy that is 10 J.
© UCLES 2020
1113/02/A/M/20
[1]
Cambridge Assessment International Education
Cambridge Secondary 1 Checkpoint

1113/01
SCIENCE
Paper 1
October 2019
45 minutes
Candidates answer on the Question Paper.
Additional Materials:
Pen
Pencil
Ruler
Calculator
READ THESE INSTRUCTIONS FIRST
Write your centre number, candidate number and name on all the work you hand in.
Write in dark blue or black pen.
You may use an HB pencil for any diagrams, graphs or rough working.
Do not use staples, paper clips, glue or correction fluid.
DO NOT WRITE IN ANY BARCODES.
Answer all questions.
You should show all your working in the booklet.
At the end of the examination, fasten all your work securely together.
The number of marks is given in brackets [ ] at the end of each question or part question.
The total number of marks for this paper is 50.
This document consists of 14 printed pages and 2 blank pages.
IB19 10_1113_01/3RP
© UCLES 2019
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2
1
The diagram shows a human stomach.
muscles
blood vessels
and digestive
cells in the
stomach lining
(a) Which term best describes the stomach?
Circle the correct answer.
cell
organ
organism
system
tissue
Use information from the diagram to explain your answer.
[2]
(b) Red blood cells and muscle cells are found in the wall of the stomach.
(i) Explain how the structure of a red blood cell is related to its function.
[2]
(ii) Explain how the structure of a muscle cell is related to its function.
[2]
© UCLES 2019
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3
2
Look at the diagram.
It shows a sealed bottle containing air particles.
air particle
(a) The air exerts a pressure on the sides of the bottle.
Explain how air exerts a pressure.
Use ideas about particles in your answer.
[1]
(b) The bottle is heated.
What happens to the pressure inside the bottle?
Explain your answer.
Use ideas about particles.
[2]
(c) A bottle of perfume is left in a room.
The top is taken off the bottle.
The smell of the perfume eventually fills the room.
What is the name of this process?
Circle the correct answer.
condensation
conduction
diffusion
melting
[1]
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3
Chen looks at different sound traces with an oscilloscope.
A
B
Describe what is happening to the sound from A to B.
Choose words from
decreases
increases
stays the same
The pitch of the sound ...................................................................... .
The frequency of the sound ....................................................................... .
The volume of the sound ...................................................................... .
The amplitude of the sound .................................................................... .
[4]
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4
This question is about completing a key to identify these four arthropods.
bee
ant
centipede
millipede
not to scale
(a) Look at the key.
The statements for boxes A, B and C are missing.
Use the diagrams to complete A, B and C.
arthropods
A ................................................
................................................
................................................
yes
no
B ................................................
C ................................................
................................................
................................................
................................................
................................................
yes
bee
no
yes
ant
centipede
no
millipede
[3]
(b) Spiders also belong to the arthropod group.
Give one feature which separates a spider from the other four arthropods.
[1]
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5
Blessy investigates the reactions of the element carbon.
Blessy uses a Bunsen burner to heat carbon.
She lets the carbon burn in air.
She then puts the burning carbon into a jar of oxygen.
The diagram shows the apparatus Blessy uses.
jar of oxygen
burning
carbon
Universal Indicator
solution
(a) Carbon is an element.
What is the chemical symbol for carbon? ..........................................
[1]
(b) The carbon reacts with the oxygen to make a gas.
(i) What is the name of this gas?
Circle the correct answer.
carbon carbonate
carbon dioxide
carbon hydroxide
carbon sulfate
[1]
(ii) The gas turns Universal Indicator solution orange.
Suggest a pH value for the solution.
pH .....................................
© UCLES 2019
[1]
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6
The diagram shows a black scabbard fish from the Atlantic Ocean.
This fish is adapted to live in very deep water where there is very little light.
(a) Describe how this fish is adapted to live where there is very little light.
[1]
(b) The black scabbard fish is a fast moving predator.
(i) Suggest how the colour of this fish helps to make it a successful predator.
[1]
(ii) Describe two other adaptations that suggest that this fish is a fast moving predator.
1
2
[2]
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7
Angelique finds information about the stopping distance of cars.
The stopping distance is the distance a car moves after the driver wants to stop the car.
32 km/h
6 metres 6 metres
48 km/h
9 metres
14 metres
64 km/h
12 metres
24 metres
80 km/h
15 metres
38 metres
96 km/h
18 metres
55 metres
112 km/h
75 metres
21 metres
speed
braking distance
thinking distance
Angelique calculates the stopping distance for a car with a speed of 32 km/h.
Here is her calculation.
6 m + 6 m = 12 m
(a) Calculate the stopping distance for a car with a speed of 112 km/h.
stopping distance =
m
[1]
(b) Describe the pattern in the information for thinking distance.
Complete the sentence.
As the speed increases by 16 km/h the thinking distance
[2]
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(c) Predict what the thinking distance will be at 128 km/h.
m
[1]
(d) The speed of the car doubles from 32 km/h to 64 km/h.
Answer the questions choosing words from
decreases
doubles
halves
more than doubles
more than halves
What happens to the thinking distance from 32 km/h to 64 km/h?
What happens to the braking distance from 32 km/h to 64 km/h?
What happens to the stopping distance from 32 km/h to 64 km/h?
[2]
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8
Safia investigates the rusting of iron.
She puts iron nails into three different test-tubes.
Each test-tube contains different conditions.
The test-tubes are then left for one week.
The diagram shows the test-tubes after one week.
A
B
C
damp air
oil
dry air
iron nail
iron nail
iron nail
water
boiled
water
rust
chemical used
to remove water
(a) The iron nail in tube A rusts.
This is because the nail reacts with water and a gas found in air.
What is the name of the gas?
[1]
(b) Complete the sentences about the investigation.
The iron nail in tube B did not rust because
The iron nail in tube C did not rust because
[2]
(c) Rusting is a reaction that is not useful.
Explain why rusting is not a useful reaction.
[1]
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9
Pierre makes an electromagnet.
iron nail
cell
coil of
insulated wire
switch
Pierre wants to make a stronger electromagnet.
What does he do?
Circle the two correct answers.
add another cell
add another switch
add more coils to the insulated wire
change the iron nail to a wooden pencil
remove the iron nail
remove the switch
turn the cell around
[2]
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10 Look at the diagram of a human skeleton.
(a) Name the tissue which makes up the skeleton.
[1]
(b) Give two functions of the skeleton.
1
2
[2]
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11 Jamila investigates the reaction of different metals with hydrochloric acid.
The metals are magnesium, zinc and iron.
She measures how long it takes for the reaction with each metal to make 50 cm3 of hydrogen gas.
(a) She thinks these variables are important in her investigation.
A the metal used
B the volume of hydrochloric acid used
C the concentration of the hydrochloric acid used
D the time to make 50 cm3 of hydrogen gas
E the temperature of the room
Which letter shows the variable Jamila changes?
Which letters show the three variables Jamila keeps the same?
,
and
Which letter shows the variable Jamila measures to find out which metal reacts the fastest?
[4]
(b) Jamila predicts that hydrochloric acid will react fastest with zinc.
Look at her results.
metal
time to make 50 cm3 of gas
in seconds
magnesium
50
iron
280
zinc
200
Is Jamila’s prediction correct?
Explain your answer.
[2]
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12 (a) Class 9 have a quiz about our solar system.
Complete the answers.
Solar System Quiz
1.
Mercury, Earth and Mars are three of the inner planets of our solar system.
What is the name of the other inner planet?
…………………………………………………………………………………………………...
2.
The most distant planet from Earth was Pluto.
Pluto has now been classified as a dwarf planet instead of a planet.
What is the name of the most distant planet from Earth?
…………………………………………………………………………………………………...
3.
What is the name of the object that all the planets in our solar system orbit?
…………………………………………………………………………………………………....
[2]
(b) Class 9 look at a photograph of the night sky.
lines
A camera normally lets light into it for a second.
The camera that took this photograph let light into it for 30 minutes.
What objects in the night sky make the lines on the photograph?
Explain why they look like lines.
[2]
© UCLES 2019
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Cambridge Assessment International Education
Cambridge Secondary 1 Checkpoint

1113/02
SCIENCE
Paper 2
October 2019
45 minutes
Candidates answer on the Question Paper.
Additional Materials:
Pen
Pencil
Ruler
Calculator
READ THESE INSTRUCTIONS FIRST
Write your centre number, candidate number and name on all the work you hand in.
Write in dark blue or black pen.
You may use an HB pencil for any diagrams, graphs or rough working.
Do not use staples, paper clips, glue or correction fluid.
DO NOT WRITE IN ANY BARCODES.
Answer all questions.
You should show all your working in the booklet.
At the end of the examination, fasten all your work securely together.
The number of marks is given in brackets [ ] at the end of each question or part question.
The total number of marks for this paper is 50.
This document consists of 15 printed pages and 1 blank page.
IB19 10_1113_02/5RP
© UCLES 2019
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2
1
The diagram shows the process of photosynthesis in a leaf of a plant.
Complete the diagram.
Choose words from the list.
carbon dioxide
glucose
minerals
nitrogen
sunlight
water
energy from ................................................
uses ...................................................... from the air
takes in ..............................................
through the roots
photosynthesis
makes ..........................................
[2]
© UCLES 2019
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3
2
Sedimentary rocks are formed in layers.
Look at the diagram of layers of sedimentary rocks.
A
fossil
B
C
D
E
not to scale
(a) Which layer has the youngest fossils?
[1]
(b) Metamorphic rocks do not normally contain fossils.
Tick () the box next to the correct explanation.
Animals did not live in areas where metamorphic rocks were formed.
Metamorphic rocks are formed when molten rock cools.
Metamorphic rocks were formed before there was life on Earth.
Metamorphic rocks were formed under high temperatures and pressures.
[1]
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3
Carlos calculates the density of an object.
(a) The object has a mass of 450 g.
The object has a volume of 50 cm3.
Calculate the density of the object.
g / cm3
density
[3]
(b) Carlos knows the densities of different metals.
10
9
8
7
6
5
density
in g / cm3
4
3
2
1
0
aluminium
copper
iron
magnesium sodium
Carlos has a piece of each of the five metals.
Each piece of metal has the same volume.
Which piece of metal has the greatest mass?
Circle the correct answer.
aluminium
copper
iron
magnesium
sodium
[1]
© UCLES 2019
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5
4
Jamila does an experiment with light.
She does the experiment in a dark room.
Here is the apparatus she uses.
white
light
red
filter
green
filter
screen
What does she see on the screen?
Explain your answer.
[3]
5
This question is about physical changes during adolescence.
Complete the table by describing one physical change that occurs during adolescence



only in males
only in females
in both males and females.
example of a physical change during adolescence
only in males
………...……………………………………………………………………………
only in females
………...……………………………………………………………………………
in both males and females
………...……………………………………………………………………………
[3]
© UCLES 2019
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6
A class of 20 students measure their body temperatures.
The thermometer shows the body temperature of student number 20.
36
35
38
37
40
39
42
41
°C
(a) The table shows the results for 19 of the students.
The result for student 20 is missing.
What is the body temperature of this student?
Write your answer in the table.
student
1
2
3
4
5
6
7
8
9
10
temperature
inC
36.9
37.1
37.0
37.1
36.9
37.0
37.1
37.0
37.2
37.1
student
11
12
13
14
15
16
17
18
19
20
temperature
inC
37.0
36.9
37.0
37.2
36.9
37.0
37.1
37.3
37.0
……...
[1]
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7
(b) Complete the tally box for all 20 students by counting the number of students at each
temperature.
Some of the rows have been done for you.
temperature
in C
tally
number of students
at this temperature
37.0
IIII II
7
37.1
IIII
5
37.2
II
2
37.3
I
1
36.6
36.7
36.8
36.9
[2]
(c) Use the grid to present the results from the completed tally box in part (b).
[3]
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7
The diagram shows part of the structure of an atom of helium.
neutrons
Z
(a) There are three types of particle in an atom.
This diagram shows only two of the types of particle.
(i) Name the particles labelled Z.
[1]
(ii) Name the particles that are missing from the diagram.
Draw on the diagram the correct position and number of the missing particles.
[2]
(b) The diagram shows the group of the Periodic Table that contains helium.
The elements are in the same order as they appear in the Periodic Table.
helium
neon
argon
krypton
xenon
radon
(i) Which element in the group has the largest atomic number?
[1]
(ii) Describe how the radius of the atom changes as you go down the group.
[1]
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8
Light is reflected from different surfaces.
rough surface
smooth surface
(a) What is the law of reflection?
Complete the sentence.
The angle of reflection equals the angle of ....................................................................... . [1]
(b) The reflections on rough and smooth surfaces are different.
Write down one difference.
[1]
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9
Many plants depend on insects such as bees for reproduction.
(a) Look at the diagram of a pollen grain viewed with a microscope.
(i) Name the part of a flower that makes pollen grains.
[1]
(ii) This pollen grain is adapted to be carried by insects.
Use the diagram to suggest how it is adapted.
[1]
(b) The following diagram shows the same pollen grain after it has landed on the stigma of a
flower.
Explain what is happening to the pollen grain and why this is necessary for reproduction to
be completed.
What is happening to the pollen grain?
Why is this necessary?
[2]
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10 Mia investigates three types of soil, A, B and C.
She wants to find out how much water each soil can hold.
She adds 20 cm3 of water to the same volume of each soil.
She collects the water that comes through in a measuring cylinder.
soil A
soil B
soil C
Look at the results of Mia’s investigation.
(a) Match the letter of the soil to the correct name of the soil.
letter
name of soil
A
clay soil
B
loam soil
C
sandy soil
[2]
(b) Loam soil contains small pieces of decaying plants.
What name describes these pieces of decaying plants?
Choose from the list.
deposits
humus
sediment
top soil
[1]
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12
11 The diagram shows how a room can be heated.
The arrows show the direction of air movement.
B
A
heater
Use the diagram to complete the sentences.
At A warm air rises because it is ................................................... .
At B cool air sinks because it is ..................................................... .
This process is called .................................................................... .
[3]
12 Pierre reacts metal compounds with acids to make three different salts.
The table shows the metal compounds and the salts he makes.
Complete the table to show the acids he uses in each reaction.
metal compound
acid
salt formed
calcium carbonate
calcium nitrate
sodium hydroxide
sodium sulfate
potassium hydroxide
potassium chloride
[2]
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13
13 Birds can live in cold places.
They trap air between their feathers.
Why does this help to keep the birds warm?
Circle the correct answer.
trapped air is a good conductor
trapped air is a good convector
trapped air is a good insulator
trapped air is a good radiator
[1]
14 A group of students are doing field work near to their school.
They choose the correct apparatus for some activities.
Draw lines to match each piece of apparatus to the activity.
activity
apparatus
cup
net
collecting ground
dwelling animals
which are active and
hunt at night
pitfall
trap
sampling aquatic
insects living in
a small stream
sampling the plants
growing in an area of
grassland
quadrat
frame
[2]
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15 Aiko wants to measure different quantities in electrical circuits.
(a) She connects this electrical circuit.
A
Complete the sentences.
The circuit diagram shows a
circuit.
The component shown by A is
.
This component measures
.
[2]
(b) She connects this electrical circuit.
V
Complete the sentences.
The circuit diagram shows a
circuit.
The component shown by V is
.
This component measures the
© UCLES 2019
across the lamp.
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15
16 The diagram shows some of the metals in the reactivity series.
most reactive
potassium
sodium
calcium
aluminium
iron
tin
lead
copper
silver
gold
least reactive
(a) Iron reacts with dilute acid but not cold water.
Write down one metal that reacts with both dilute acid and cold water.
Choose your answer from the list in the diagram.
[1]
(b) Copper reacts with silver nitrate but not with lead nitrate.
Explain why.
[2]
(c) When copper reacts with silver nitrate two products are made.
Write down the names of these two products.
and
© UCLES 2019
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[1]
Cambridge Assessment International Education
Cambridge Secondary 1 Checkpoint

1113/01
SCIENCE
Paper 1
April 2019
45 minutes
Candidates answer on the Question Paper.
Additional Materials:
Pen
Pencil
Ruler
Calculator
READ THESE INSTRUCTIONS FIRST
Write your Centre number, candidate number and name on all the work you hand in.
Write in dark blue or black pen.
You may use an HB pencil for any diagrams, graphs or rough working.
Do not use staples, paper clips, glue or correction fluid.
DO NOT WRITE IN ANY BARCODES.
Answer all questions.
You should show all your working in the booklet.
At the end of the examination, fasten all your work securely together.
The number of marks is given in brackets [ ] at the end of each question or part question.
The total number of marks for this paper is 50.
This document consists of 18 printed pages and 2 blank pages.
IB19 05_1113_01/5RP
© UCLES 2019
[Turn over
2
1
The list contains the names of different parts of a cell.
cell membrane
cell wall
cytoplasm
nucleus
chloroplast
(a) The table shows where different parts of a cell are found.
Complete the table by placing ticks () in the correct boxes.
One has been done for you.
where the part of the cell is found
part of a cell
only in
animal cells
only in
plant cells
in both animal and
plant cells
cell membrane
cell wall

cytoplasm
nucleus
chloroplast
[3]
(b) Which part of a cell contains the genetic material?
[1]
© UCLES 2019
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3
2
There are stars, planets and other objects in space.
name
type of object
Mars
planet
Moon
natural satellite
Polaris
star
Sirius
star
(a) Use the table to write down the names of two light sources in space.
1
2
[1]
(b) Humans can see Mars from Earth.
(i) Describe why we can see Mars in the night sky.
[1]
(ii) Describe why we cannot see details on the surface of Mars.
[1]
(c) Humans can see the star Polaris from Earth.
It appears to move during different times of the year.
Explain why Polaris appears to move.
[1]
© UCLES 2019
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3
The diagram shows part of the rock cycle.
igneous rock
melting and cooling
melting and cooling
heat and
pressure
weathering
weathering
............................................................
heat and
pressure
.............................................................
(a) Complete the diagram by writing in the two missing types of rock.
© UCLES 2019
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[2]
5
(b) Pierre investigates rocks.
He describes the rocks he investigates.
Here is a table of his observations.
rock
observation
A
grey and white rock that has a low density
B
black rock that has a high density
C
shiny black rock that looks like glass
D
black rock that has a low density
Use this key to identify the four rocks.
yes
looks like
glass
no
obsidian
low
density
grey and
white
pumice
black
scoria
yes
no
basalt
A
B
C
D
[2]
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4
The diagram shows the human circulatory system.
Parts of the system are labelled with the letters A to G.
A
B
G
C
F
D
E
not to scale
Use the diagram to identify parts of the circulatory system from their descriptions.
Write your answers in the table.
description
letter
the part that pumps blood to the lungs
the part where oxygen leaves the blood
the part where the blood is at its greatest pressure
an artery that takes blood to the body
[4]
© UCLES 2019
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7
5
The diagrams show the particles in different substances.
Draw a line to match each diagram with the description of that diagram.
diagram
description
mixture of compounds
mixture of elements
mixture of elements and compounds
single compound
single element
[3]
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6
Safia and Jamila investigate photosynthesis.
They use water plants.
Here is the apparatus they use.
gas
bubbles
lamp
light
water
water plant
(a)
In their first experiment they measure the number of gas bubbles made in one minute.
(i)
What is the name of the gas made in photosynthesis?
Circle the correct answer.
carbon dioxide
(ii)
methane
nitrogen
oxygen
water
[1]
What equipment does Safia use to measure one minute?
[1]
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9
(b)
Safia and Jamila do two more experiments.
They move the lamp further away from the plant for each experiment.
Here are their results.
(i)
distance between light and
water plant in cm
number of gas bubbles in
one minute
10
98
20
54
40
26
Why do they use one minute for each experiment?
[1]
(ii)
Complete the sentence describing the pattern of results.
As the distance between the light and the water plant increases,
[1]
(c)
Predict the results for:
a distance of 30 cm =
gas bubbles
a distance of 50 cm =
gas bubbles
[1]
(d)
Circle the correct word or phrase that completes the conclusion.
increases
The rate of photosynthesis
does not change
decreases
© UCLES 2019
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as light decreases.
[1]
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7
Lily balances a ruler on a pivot.
ruler
12 cm
6 cm
pivot
2N
A
Calculate the size of the force A.
force A
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[2]
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11
8
Angelique and Mike decide to make copper chloride.
(a)
They mix copper carbonate with an acid.
Write the name of the acid they use.
[1]
(b)
The sentences A – E describe the method they use.
The sentences are in the wrong order.
A
The solution (filtrate) is left for the crystals to grow.
B
The solution (filtrate) is put into an evaporating dish.
C
The solution (filtrate) is heated until the first crystals appear.
D
Excess copper carbonate is added to the acid until there is no more fizzing.
E
The excess copper carbonate is removed by filtering.
Complete the boxes to show the correct order.
One box has been done for you.
D
© UCLES 2019
[2]
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12
9
Class 7 investigate air resistance.

They run from one end of the playground to the other end of the playground.

They measure the time to complete the run.

They repeat the run with umbrellas.
umbrella
(a) Class 7 write down their results.
no umbrella = 10 seconds
with umbrella = 14 seconds
no umbrella = 8 seconds
with umbrella = 9 seconds
no umbrella = 7 seconds
with umbrella = 13 seconds
no umbrella = 11 seconds
with umbrella = 15 seconds
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13
(i) Write their results in the table.
time with
no umbrella
in seconds
time
with umbrella
in seconds
[1]
(ii) Calculate the mean (average) times.
mean time with no umbrella =
s
mean time with umbrella =
s
[1]
(b) Write down a conclusion for this investigation about air resistance.
[2]
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10 The diagrams show the modern horse and three of its ancestors.
1 toe
3 toes
3 toes
4 toes
horse ancestor
55
modern horse
40
17
4
million years ago
(a) What evidence has been used to find out the appearance of the ancestors of the modern
horse?
[1]
(b) The appearance of the horse has changed over the last 55 million years.
(i) Use the diagrams to describe two ways the appearance of the horse has changed.
1
2
[2]
(ii) A scientist developed the theory of natural selection to explain this gradual change in
appearance.
What is the name of this scientist?
[1]
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15
11 Pierre investigates a type of reaction.
He reacts different metals with different salt solutions.
Here are his results.
metal
salt solution
observation
copper
tin nitrate
no reaction
iron
tin nitrate
reaction
tin
iron sulfate
no reaction
magnesium
zinc sulfate
reaction
zinc
iron sulfate
reaction
(a) Put the metals in order of reactivity.
One has been done for you.
most reactive
iron
[1]
least reactive
(b) What type of reaction does Pierre investigate?
[1]
(c) Magnesium reacts with zinc sulfate solution.
This reaction has two products.
Write the word equation for this reaction.
+
..................................
+
..................................
..................................
..................................
[2]
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16
12 Oliver and Chen walk to school.
Here is information about their walk to school.
time
in s
Oliver’s distance
in m
Chen’s distance
in m
0
0
0
200
200
0
400
400
300
600
600
600
800
800
900
1000
1000
1000
(a) They plot a distance-time graph.
Chen’s graph has been done for you.
Plot the graph for Oliver’s results on the same graph paper.
1200
1000
800
distance in m
600
400
200
0
0
200
400
600
800
1000
1200
time in s
[2]
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(b) The school is 1000 m from where Oliver and Chen started walking.
Who walked to school in the shorter time?
Circle the correct answer.
cannot tell from the information
Chen
Oliver
they never reached the school
they took the same time
Explain your answer.
[1]
13 Measuring cylinders are used to measure volume.
Look at the diagram.
rock
350
300
250
200
150
100
50
0
350
300
250
200
150
100
50
0
What is the volume of the piece of rock?
cm3
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18
14 The properties of sound can be explained using a diagram.
dots
loud speaker
A
ear
B
Complete the sentences.
The first sentence has been done for you.
Choose words from
air
close together
mass
compression
pressure
The dots on the diagram are
rarefaction
air
density
solid
far apart
sound
particles.
In area A the dots are .................................................... .
This area is called a .................................................... .
In area B the dots are .................................................... .
This area is called a .................................................... .
[4]
© UCLES 2019
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Cambridge Assessment International Education
Cambridge Secondary 1 Checkpoint

1113/02
SCIENCE
Paper 2
April 2019
45 minutes
Candidates answer on the Question Paper.
Additional Materials:
Pen
Pencil
Ruler
Calculator
READ THESE INSTRUCTIONS FIRST
Write your Centre number, candidate number and name on all the work you hand in.
Write in dark blue or black pen.
You may use an HB pencil for any diagrams, graphs or rough working.
Do not use staples, paper clips, glue or correction fluid.
DO NOT WRITE IN ANY BARCODES.
Answer all questions.
You should show all your working in the booklet.
At the end of the examination, fasten all your work securely together.
The number of marks is given in brackets [ ] at the end of each question or part question.
The total number of marks for this paper is 50.
This document consists of 15 printed pages and 1 blank page.
IB19 05_1113_02/4RP
© UCLES 2019
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2
1
Yeast is a living organism.
(a) Write down three life processes.
1
2
3
[1]
(b) Louis Pasteur investigated the effect of yeast on grape juice.
He mixed yeast cells with grape juice.
He looked at a slide of this mixture using a microscope.
He looked at a new slide of the mixture after seven days.
yeast cell
after
seven
days
(i) Describe one way the appearance of the slide has changed.
[1]
(ii) Explain the cause of this change in appearance.
[1]
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3
2
Lily is in a lesson just before lunch.
She is hungry and can smell the food cooking in the school kitchen.
(a) We smell food because particles of gas travel from the food.
Which sentence is true about gases?
Tick () the box next to the correct sentence.
Forces between the particles are weak.
The particles are only able to vibrate.
The particles form a fixed shape.
The particles have very little energy.
[1]
(b) What word describes how the smell reaches Lily?
Circle the correct answer.
absorption
diffusion
dissolving
mixing
[1]
(c) The smell from hot food reaches Lily before the smell from cold food.
Explain why.
Use ideas about particles.
[2]
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4
3
Label the diagram showing the reflection of light by a mirror.
Choose words from
angle of incidence
angle of reflection
normal
incident ray
reflected ray
mirror
[3]
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4
The diagram shows the female parts of a flower.
A
B
C
D
E
(a) Where does pollination take place in the flower?
......
Circle the correct answer.
A
B
C
D
E
[1]
(b) What happens during pollination in the flower?
[1]
(c) Where does fertilisation take place in the flower?
......
Circle the correct answer.
A
B
C
D
E
[1]
(d) Describe what happens during fertilisation in the flower.
[1]
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6
5
Rajiv investigates the water content of some soils.
Here is his method.
Rajiv
 measures the mass of an evaporating dish
 adds 20 g of soil into the evaporating dish
 puts the dish of soil into a drying oven for 24 hours
 measures the new mass of the dish and the soil
 does this with four more different soils.
(a) What apparatus does Rajiv use to measure the mass of the soil and dish?
[1]
(b) Here are his results.
soil sample
mass of soil and
dish before drying
in g
mass of soil and
dish after drying
in g
change in mass of
soil
in g
A
126
125
1
B
128
124
4
C
132
127
5
D
136
130
6
E
131
128
3
Which soil sample contains the most water?
Choose from A, B, C, D or E.
[1]
(c) Write down one safety hazard in Rajiv's investigation and describe how he should avoid it.
safety hazard
To avoid the hazard Rajiv should
[2]
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7
6
Class 9 learn about coloured light.
Their teacher tells them about colour addition.
She gives them a diagram showing equal amounts of the primary colours of light overlapping.
Label the diagram with the correct colours.
green
red
blue
[2]
7
Complete these sentences about making salts.
Salts can be made by reacting metals or metal carbonates with acid.
When metals react with acid, the products are a salt and
.
When metal carbonates react with acid, the products are a salt,
and
.
[3]
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8
8
A group of birdwatchers collect data to show how the numbers of farmland birds change over
time.
The graph shows the change in number of farmland birds between 1975 and 2015.
60
50
40
number of
farmland birds
30
20
10
0
1975 1980 1985 1990 1995 2000 2005 2010 2015
year
(a) The data for each year was obtained from a large number of observations.
Explain why it is a good idea to make a large number of observations.
[1]
(b) The results shown in the graph are estimates.
Explain why it is not possible to find the exact number of farmland birds.
[1]
(c) The birdwatchers measured the change in numbers of farmland birds.
Write down two factors that affect the number of farmland birds.
1
2
[2]
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9
9
(a) Atoms are made up of three different particles.
Complete the sentences about the different particles in an atom.
The nucleus of an atom contains
.
and
.
The nucleus is surrounded by particles called
[3]
(b) The diagram shows part of the Periodic Table.
H
O
Na
Ne
Cl
transition elements
(i) What is the chemical symbol for the smallest atom?
Choose from H, O, Ne, Na or Cl.
[1]
(ii) Which chemical symbol shows a metal?
Choose from H, O, Ne, Na or Cl.
[1]
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10
10 The diagram shows a food web in a field.
hawk
snake
mouse
lizard
rabbit
grasshopper
grass
(a) Explain what is shown by the arrows in a food web.
[1]
(b) Name three primary consumers in this food web.
[1]
(c) Why is it difficult to classify the hawk as a secondary consumer?
[1]
(d) Name an organism that competes with the lizard for food.
[1]
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11
(e) The rabbits are all killed by a disease.
What effect does this have on the number of mice?
Give a reason for your answer.
effect on number of mice
reason
[1]
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12
11 Carlos uses the internet to collect information about the use of world energy resources in 2016.
hydroelectric
6%
nuclear
5%
other
renewables
2%
33%
oil
24%
natural
gas
30%
coal
(a) Hydroelectric is a renewable resource.
Write down the names of two other types of renewable resources.
and
[1]
(b) The pie chart will be different in the year 2050 compared to 2016.
Suggest three differences.
[3]
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12 Blessy compares two electrical circuits.
X
X
circuit A
circuit B
(a) Which electrical component must be in position X to make the lamps work?
The name of this electrical component is
.
Draw the electrical circuit symbol for this component.
[2]
(b) All of the lamps are working in both circuits.
Blessy removes one lamp from circuit A and one lamp from circuit B.
Explain what happens to the other lamps in the circuits.
In circuit A the other lamps
.
This is because
.
In circuit B the other lamps
.
This is because
.
[2]
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14
13 Mia investigates the reaction of metals with water.
She adds a metal to water and collects the gas produced.
The diagram shows her apparatus.
gas
cold water
filter funnel
metal
(a) Write down the name of the gas produced in the reaction.
[1]
(b) Mia uses the metal calcium in her first experiment.
The calcium reacts with the water to form a compound.
What is the name of this compound?
Circle the correct answer.
calcium carbonate
calcium chloride
calcium hydrate
calcium hydroxide
calcium oxide
[1]
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15
(c) Mia wants to repeat her experiment with potassium.
Her teacher tells her that she cannot use potassium.
Why should Mia not use potassium?
[1]
14 Ahmed is learning about pressure.
He pushes a pin on the surface of a balloon.
pin
Ahmed
surface of balloon
The balloon bursts (pops).
Ahmed repeats the investigation with an identical balloon.
He does not use a pin.
He pushes a blunt pencil with the same force.
blunt pencil
Ahmed
surface of balloon
The balloon does not burst.
Explain why the balloon does not burst.
[2]
© UCLES 2019
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16
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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
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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.
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