SCIE-A-MATICS: “Your Dream Turns to Science”
JCE FINAL EXAMINATIONS REVISION QUESTIONS
SCIEN-A-MATICS TUTORIAL SERVICES
Volume 2:2022
JCE FINAL
EXAMINATIONS
REVISION
INTEGRATED SCIENCE
STRUCTURED QUESTIONS
©Mr. Thuso Lemogang
SCIEN-A-MATICS TUTORIAL SERVICES
WhatsApp +26774066455/+26771997080 FOR A COPY
New
Questions
Added
DISCLAIMER....................................................................................................................................... 2
SECTION A (Periodic Table is on the last Page) ............................................................................... 3
Section A Year 2012 Examinations Questions (Answer Book Page 3-12).......................................... 3
Section A Year 2014 Examinations Questions (Answer Book Page 13-22)...................................... 13
Section A Year 2017 Examinations Questions (Answer Book Page 22-31)...................................... 23
Section A Year 2018 Examinations Questions (Answer Book Page 41-50)...................................... 33
Section A Year 2019 Examinations Questions (Answer Book Page 51-62)...................................... 43
Section A Year 2020 Examinations Questions (Answer Book Page 32-40)...................................... 55
Section A Year 2021 Examinations Questions (Answer Book Page 63-72)...................................... 63
SECTION B ......................................................................................................................................... 71
Section B Year 2012 Examinations Questions (Answer Book Page 73-76)...................................... 71
Section B Year 2014 Examinations Questions (Answer Book Page 77-80)...................................... 75
Section B Year 2017 Examinations Questions (Answer Book Page 81-82)...................................... 79
Section B Year 2018 Examinations Questions (Answer Book Page 83-86)...................................... 83
Section B Year 2019 Examinations Questions (Answer Book Page 87-89)...................................... 87
Section B Year 2020 Examinations Questions (Answer Book Page 90-92)...................................... 90
Section B Year 2021 Examinations Questions (Answer Book Page 93-96)...................................... 93
.............................................................................................................................................................. 97
1
TABLE OF CONTENTS
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form to third parties without prior written permission from the Author. The Booklet is intended
for use by the person duly authorized in writing or any other form.
2
DISCLAIMER
Section A Year 2012 Examinations Questions (Answer Book Page 3-12)
The diagram below shows the heart at different stages, E and F, during a heart-beat.
Use it to answer questions 1 (a) and (b).
1. (a)
(i) Name the blood vessel, X.
……………………………………………………………………………... (1)
(ii) Which of the blood vessels, X or the pulmonary vein, carries blood with more
oxygen?
……………………………………………………………………………. (1)
(iii)
Explain your answer in (a) (ii).
……………………………………………………………………… (1)
(b) Describe what happens at stage E.
………………………………………………………………………………
………………………………………………………………………………
………………………………………………………………………………
……………………………………………………………………………… (2)
(c) What is the function of the valves at stage F?
…………………………………………………………………………………. (1)
3
SECTION A (Periodic Table is on the last Page)
2. (a) On the diagram, label with a letter,
(i)
U, the part where hormones are produced.
(1)
(ii)
T, the part where implantation normally takes place.
(1)
(b) (i) Name the birth control device shown.
......................................................................................................................... (1)
(ii)
Explain how the device works in birth control.
(iii)
............................................................................................................ (2)
(iv)
State one disadvantage of using this device of birth control.
……………………………………………………………………………..
……………………………………………………………………………..
…………………………………………………………………………….. (1)
4
The diagram below shows a birth control device used in a part of a female
reproductive system. Use it to answer question 2.
Gas
Nitrogen
Oxygen
Carbon dioxide
Composition of gases in
Inhaled air
Exhaled air
79%
78.7%
20%
16%
0.03%
4.2%
3.
(a) Calculate the percentage of oxygen absorbed into the blood from inhaled air. Show
your working.
Percentage of oxygen = ……………………………. (2)
(b) Explain why 4.2% of carbon dioxide was exhaled whereas 0.03% was inhaled.
……………………………………………………………………………………...
……………………………………………………………………………………...
……………………………………………………………………………………...
(2)
(c) Gaseous exchange occurs in the lungs.
(i)
Name the part of the lungs where gaseous exchange occurs.
……………………………………………………………………………..
(1)
(ii)
State one characteristic of the part named in (c) (i).
……………………………………………………………………………..
(1)
5
The table below shows the average percentage composition of gases in inhaled air
and in exhaled air by human beings.
Use it to answer questions 3 (a) and (b).
Substance
PH value
P
5
Q
7
R
13
S
9
T
1
4.
(a) Which of the substances P, Q, R, S or T
(i)
Is week acid?
…………………………………………………………………………. (1)
(ii)
Could be pure water?
……………………………………………………….............................. (1)
(iii) Would be the best to neutralize excess acid in the stomach?
………………………………………………………………………….. (1)
(b) What will be the colour of a universal indicator liquid in substances S and T?
S…....................................................................
T…...................................................................
(2)
6
The table below shows the pH values of the five substances.
Use it to answer question 4.
5.
(a) In which group of the Periodic Table is carbon found?
………………………………………………………………………………….. (1)
(b) Give a term used to refer to different forms of the same element.
………………………………………………………………………………….
…………………………………………………………………………………. (1)
(c)
(i)
Which of the above, X or Y, conducts electricity?
………………………………………………………………………….. (1)
(ii)
State the reason for your answer in (c) (i).
…………………………………………………………………………..
………………………………………………………………………….. (1)
7
Diagrams X and Y represent different forms of carbon.
Use the diagram to answer question 5.
6.
(a) A thermometer is missing from the set-up.
Use a cross (x) to show the position where the bulb of the thermometer should be
placed in the beaker.
(b) Using the grid below, sketch the heating curve of the water in the investigation
above. Label the curve with letter A.
(2)
(c) The experiment was repeated, now heating with two Bunsen burners to double the
amount of heat.
On the grid, sketch the expected heating curve of the repeated experiment and label
it B.
(2)
8
Use the diagram and the information below to answer question 6.
The diagram shows an incomplete set-up used to investigate the change in the
temperature of pure water when heated. The pure water used in the experiment was at
room temperature of 25℃ and was heated until it boiled. The boiling point of water is
96℃ and the water took 20 minutes to boil.
7.
(a) State the difference between the two thermometers.
………………………………………………………………………………….
…………………………………………………………………………………. (1)
(b)
(i)
Which of the thermometers can be used to measure a wider range of
temperatures?
………………………………………………………………………….. (1)
(ii)
Explain your answer in (b) (i).
………………………………………………………………………….
………………………………………………………………………….
…………………………………………………………………………. (1)
(c) The reading on thermometer A is 27℃.
What will be the reading in the Kelvin scale?
………………………………K (2)
9
The diagrams below show two laboratory mercury thermometers A and B.
Use them to answer question 7.
8.
(a) Name the type of the mirrors used in the optical instrument.
………………………………………………………………………………….. (1)
(b) On the diagram, show how the light rays reach the student’s eye.
(2)
(c) State any of the laws of reflection.
………………………………………………………………………………….. (1)
(d)
(i)
Describe a transverse wave.
…………………………………………………………………………
…………………………………………………………………………
………………………………………………………………………… (1)
(ii)
Give one example of a transverse wave.
…………………………………………………………………………. (1)
9.
(a)
(i)
(ii)
State any two effects of a force on the motion of a body.
………………………………………………………………………….
………………………………………………………………………….
…………………………………………………………………………. (2)
Define acceleration.
………………………………………………………………………….
………………………………………………………………………….
…………………………………………………………………………. (1)
10
The diagram below shows an optical instrument used by a student to view an
object. Use it to answer questions 8 (a) and (b).
(b)
(i)
The acceleration of the trolley is 1.5 m/s2.
Calculate the magnitude of force F.
…………………………………… (3)
(ii)
Another force of 2.0 N is applied on the trolley in the opposite direction.
Suggest what will happen to the motion of the trolley.
…………………………………………………………………………
…………………………………………………………………………. (1)
(iii) Apart from force F, name any other force acting on the body.
………………………………………………………………………… (1)
(c) A bus leaves the bus rank and its speed increases from 0 to 60 m/s in 30 seconds.
Calculate the acceleration of the bus.
…………………………..m/s2 (2)
10. Name any two layers of the Earth.
………………………………………………………………………………………
……………………………………………………………………………………… (2)
11
The diagram below shows a trolley of mass 2.0 kg pulled along a smooth surface
with a constant force, F.
Use it to answer 9 (b).
11.
(a) Name the method used in the diagram above to magnetise the iron bar.
………………………………………………………………………………….. (1)
(b) What pole would be induced at end B on the iron bar?
………………………………………………………………………………….. (1)
(c)
(i)
What type of magnet would be formed?
………………………………………………………………………… (1)
(ii)
Explain your answer in (c) (i).
………………………………………………………………………... (1)
(d) Name another method that can be used to magnetise the iron bar.
………………………………………………………………………………….. (1)
12
The diagram below shows one of the methods that can be used to magnetise a piece
of an iron bar. Use it to answer question 11.
Use the information below to answer question 12.
Silicon is a non-metal element. Some of the properties of silicon are similar to those of
metals.
The following is a list of some of the properties of silicon.
•
•
•
•
Shiny and grey in colour
Hard but brittle
Melts at 1410 ℃
Forms acidic oxide
12.
(a) Which two of the properties of silicon are similar to those of metals?
..............................................................................................................................
………………………………………………………………………………….. (2)
(b)
(i)
What is the physical state of silicon at room temperature?
................................................................................................................. (1)
(ii)
Describe the arrangement and the movement of particles in a silicon
element at room temperature.
Arrangement
…………………………………………………………………………. (1)
Movement
…………………………………………………………………………. (1)
(c)
(i)
In the space below, draw the atomic structure of silicon showing all
electrons. Indicate the number of protons and that of neutrons in your
drawing.
(ii)
Which part of the atom contains protons?
…………………………………………………………………………. (1)
13
Section A Year 2014 Examinations Questions (Answer Book Page 13-21)
catalyst
………………….. →
…………………. + …………………… (2)
(ii)
Name a suitable catalyst that is used in the reaction.
…………………………………………………………………………. (1)
(b) Ozone (O3) and Oxygen (O2) are different forms of the same element in the same
physical state.
What term is used to describe these two forms of the same element?
………………………………………………………………………………….. (1)
14
13. Oxygen can be obtained in the laboratory by the decomposition of hydrogen peroxide
in the presence of a catalyst.
(a)
(i)
Complete the word equation below for the decomposition of hydrogen
peroxide.
14.
(a) Explain why the heating element is placed near the base of the kettle.
…………………………………………………………………………………..
…………………………………………………………………………………..
………………………………………………………………………………….. (2)
(b) The heating element of the kettle has the power rating of 2500 W.
(i)
Explain this statement in terms of energy.
…………………………………………………………………………..
………………………………………………………………………….. (1)
(ii)
The cost of 1 unit of electrical energy (1 kWh) is P0.60.
Calculate the cost of using the kettle for 15 hours.
Cost = ………………………………………….. (3)
(c) Suggest an improvement that can be made to the kettle to reduce heat loss.
…………………………………………………………………………………..
…………………………………………………………………………………..
………………………………………………………………………………….. (1)
(d) State any two methods of heat transfer.
…………………………………………………………………………………..
………………………………………………………………………………….. (2)
15
The diagram below shows an electric kettle with the body made of metal. The
kettle is filled with water. Use it to answer questions 14(a) to (c).
(a) State the principle of moments.
…………………………………………………………………………………..
………………………………………………………………………………….. (2)
Use the diagram and the information below to answer questions 15 (b) to (d).
16
15.
A boy is standing on a metal bar of length 8 m as shown in the diagram below. The metal
bar is supported at the point A and it is balanced horizontally. The body is standing 2
metres from point A. the weight of the metal bar, W, acts at the centre of the metal bar.
(b) Which term describes the turning effect of force at point A?
…………………………………………………………………………………..
………………………………………………………………………………….. (1)
(c) Calculate the turning effect of a force about point A due to the boy.
Moment of force = …………………………………… (2)
(d) Calculate the weight of the metal bar.
Weight = ……………………………………. N (2)
16.
(a) What method of magnetization is used in the machine shown?
………………………………………………………………………………….. (1)
(b) The machine can lift a maximum load of 5000 N.
Suggest two ways in which the machine can be improved to make it lift a heavier
load.
…………………………………………………………………………………..
………………………………………………………………………………….. (2)
(c)
(i)
(ii)
(iii)
Which of the diagrams below shows the correct way of storing magnets?
……………………………………………………. (1)
Give a reason for your answer to (c) (i) above.
…………………………………………………………………………(1)
Why is steel classified as a hard magnetic material?
…………………………………………………………………………(1)
17
The diagram below shows a machine used to lift a load.
Use it to answer question 16.
Hormone
Function
Insulin
Prepares the body for action
Testosterone
Stimulates liver cells to convert excess glucose
To glycogen
Progesterone
Controls the development of secondary sexual
Characteristics
Adrenalin
Promotes development of a deep voice
Oestrogen
(3)
18
17. Below is a list of hormones and the functions of some of them.
Draw a line to connect a hormone with its functions. One has already been done for
you.
19
Use the information below to answer question 18.
In an ecosystem, an ecologist found a mophane tree to be having 10 000 leaves which are
food for 1000 mophane worms. On the same tree, there were 2 owls which were depending
on 100 weaver birds for their food. The weaver birds feed on mophane worms.
18.
(a) Name the habitat in the ecosystem.
………………………………………………………………………………….. (1)
(b) Draw a labeled pyramid of numbers for the ecosystem described above.
(3)
(c) All mophane worms were harvested from the tree.
Suggest two ways in which the ecosystem will be affected.
………………………………………………………………………………….. (2)
19.
(a) What does the letter X represent?
……………………………………………………………………………… (1)
(b) Which letter represents;
(i)
Respiration?
……………………………………………………………………… (1)
(ii)
Combustion?
……………………………………………………………………… (1)
(i)
On the diagram, draw an arrow to represent the process of
photosynthesis and label it P.
(1)
(ii)
Write the word equation for photosynthesis.
(c)
...........................................................................................................
……………………………………………………………………... (3)
20
The diagram below shows an incomplete carbon cycle. The letters A and G
represent some of the processes that take place in the cycle.
Use the diagram to answer question 19.
20.
(a) State with a reason, which of the food substances P, Q, R or S is the best source of
energy.
Food substance …………………………………………………………………. (1)
Reason ………………………………………………………………………….. (1)
(b)
(i)
At an ante-natal clinic, an unborn baby was suspected to be underweight.
Which of the food substances P, Q, R or S would be best recommended to
the mother?
…………………………………………………………………………. (1)
(ii)
Explain your answer to (b) (i) above.
…………………………………………………………………………. (1)
(c) State with a reason, which of the food substances P, Q, R or S would most likely
lead to heart related diseases if eaten for a prolonged period.
Food substance …………………………………………………………………. (1)
21
The pie charts below represent the proportions of different nutrients found in food
substances P, Q, R and S. Use them to answer questions 20 (a) to (c).
(d) State the end product in the digestion of carbohydrates.
………………………………………………………………………………….. (1)
21. The following is a list of some features of the Earth’s spheres
From the list, circle the features of hydrosphere.
Plants
Rivers
Insects
Rain
Rocks
(2)
22
Reason
……………………………………………………………………………...
……………………………………………………………………………… (1)
23
Section A Year 2017 Examinations Questions (Answer Book Page 22-31)
22. Below is a list of terms and the definitions.
Draw a line to connect a term with its definition.
The first one has been done for you.
Term
Definition
Transverse wave
The distance between two identical
crests in a wave
Scalar
Distance moved in a given direction
Displacement
Frequency
Longitudinal
wave
A quantity having only magnitude but
with no direction
Whereby the direction of vibration is
parallel to the direction of the wave
Wavelength
(3)
23. State two effects of volcanic eruptions on people.
………………………………………………………………………………………
……………………………………………………………………………………… (2)
24.
(a)
(i)
Which letter represents the female flower of the plant?
………………………………………………………………………….. (1)
(ii)
Explain your answer to (a) (i).
………………………………………………………………………….. (1)
(i)
Suggest the agent of pollination for the plant.
………………………………………………………………………….. (1)
(ii)
Explain your answer to (b) (i).
………………………………………………………………………….. (2)
(b)
25.
(a) What is a drug?
…………………………………………………………………………………
………………………………………………………………………………….. (2)
24
The diagram below shows a maize plant with flowers labeled P and R.
Use it to answer question 24.
(b)
(i)
(ii)
From the graph, identify the drug that is most effective on the infection.
…………………………………………………………………………. (1)
Explain your answer to (b) (i).
………………………………………………………………………….
…………………………………………………………………………. (1)
(c)
(i)
(ii)
Which drug is most likely to be abused?
…………………………………………………………………………. (1)
Give a reason for your answer to (c) (i).
…………………………………………………………………………. (1)
25
The graph below shows the effect of drugs E, F, and G on the level of infection in a human
body over a period of time. Use it to answer questions (b) and (c).
26.
(a) Name blood components X, Y and Z.
X …………………………………………..
Y ……………………………………………
Z ……………………………………………
(3)
(b) State two ways in which the structure of component X differs from the component
Z.
…………………………………………………………………………………..
…………………………………………………………………………………..
………………………………………………………………………………….. (2)
(c) Name the type of blood vessel shown in the diagram.
………………………………………………………………………………….. (1)
(d) What will be the effect of having fewer than normal of component Y in the blood?
…………………………………………………………………………………..
………………………………………………………………………………….. (1)
26
The diagram below shows different components of blood labeled X ,Y and Z, in a
blood vessel of a healthy person. Use it to answer question 26.
(a) Write a word equation for the reaction when the ore, copper Sulphide, is heated in
air.
…………………………………………………………………………………..
………………………………………………………………………………….. (2)
(b) Sulphur dioxide gas produced is often released into the atmosphere.
State and explain the effects of Sulphur dioxide gas on the environment.
…………………………………………………………………………………..
………………………………………………………………………………….. (2)
(c) Name any gas produced, when the ores of copper are heated, other than Sulphur
dioxide.
…………………………………………………………………………………. (1)
(d) The copper oxide is burned with carbon.
State two substances produced when copper oxide is heated in carbon.
…………………………………………………………………………………..
………………………………………………………………………………….. (2)
27
27. Copper Sulphide is one of the ores of copper. When copper Sulphide is heated in air,
copper oxide and Sulphur dioxide gas are produced.
28.
(a)
(i)
Name part X of the optical instrument.
………………………………………………………………………... (1)
(ii)
Which property of light does the optical instrument use?
………………………………………………………………………... (1)
(iii) On the diagram, show how it is possible for the observer to see the object
on the other side of the wall.
(2)
(b) State any two uses of a convex mirror
…………………………………………………………………………………..
………………………………………………………………………………….. (2)
28
The diagram below shows how certain optical instrument works.
Use it to answer question 28.
29.
(a) Name instrument N.
………………………………………………………………………………… (1)
(b) How many cells are there in the circuit?
………………………………………………………………………………… (1)
Three wires S, T and U of the same material, same thickness but different lengths were
used. Each wire was connected to the circuit between points P and Q at different times.
The table below describes the brightness of the bulb when wires S, T and U were
connected to the circuit.
Wire
S
T
U
Brightness of bulb
dim
bright
very dim
(c) Arrange the wires S, T and U in the order of increasing resistance.
………………………………………………………………………………… (2)
(d) When each of the wires was connected to the circuit, it became warm after some
time
(i)
State why the wires became warm when connected to the circuit.
…………………………………………………………………………..
………………………………………………………………………….. (1)
(ii)
Which of the wires became warm fastest?
………………………………………………………………………….. (1)
(e) When wire T was connected to the circuit, the readings obtained from instruments
N and O were 0.10 A and 12 V, respectively.
Calculate the resistance of the wire.
Resistance = ………………………………………. Ώ
29
The diagram below shows a circuit used to investigate one of the factors affecting
resistance of a wire. Use it to answer question 29.
•
•
•
30
30. A list of materials is given below.
Water
Copper wire
Oxygen gas
(a)
(i)
In which of the given materials would sound travel slowest?
………………………………………………………………………… (1)
(ii)
Explain your answer to (a) (i).
………………………………………………………………………… (1)
(b) In the box provided below, draw the arrangement of particles in a copper wire.
(1)
When the candle wax gets heated up, the pin falls. The time taken for the pin to fall off
was measured when the metal container was filled with soil. The experiment was
repeated by replacing the soil with cold water and later with cotton wool.
The table below shows the time taken for the pin to fall off when each of the materials
was used.
Material
Time taken for the pin to fall
/ minutes
Soil
8
Cotton wool
20
Cold water
12
(a)
(i)
Which of the materials is a poor insulator of heat?
……………………………………………………………………….... (1)
(ii)
Explain your answer in (a) (i).
………………………………………………………………………… (1)
(b) State two processes through which heat reaches the candle wax.
…………………………………………………………………………………..
………………………………………………………………………………….. (2)
(c) The inside wall of the metal container is painted white.
How will this affect the time taken for the pin to fall off?
………………………………………………………………………………….. (1)
(d) Explain why a wooden lid is used in the set-up
…………………………………………………………………………………..
………………………………………………………………………………….. (2)
31
31. A metal vessel, filled with hot water at 90℃, is placed on top of a wooden block at the
centre of a large metal container. The metal container is filled with soil and covered
with wooden lid. A metal pin was attached to the metal container with candle wax. The
set-up is shown below.
(a)
(i)
What happens to the size of the balloon after a few minutes?
………………………………………………………………………… (1)
(ii)
Explain your answer in (a) (i).
…………………………………………………………………………
…………………………………………………………………………
………………………………………………………………………… (2)
(b) After some time water droplets were found on the outside surface of the balloon.
Describe how the water droplets were formed.
…………………………………………………………………………………..
………………………………………………………………………………….. (2)
(c) State one property of matter.
………………………………………………………………………………….. (1)
32
32. An inflated balloon is tied to test-tube containing cold water. The test-tube is then
placed in a beaker containing hot water. The set-up is shown below.
(3)
The diagram below illustrates gaseous and material exchange in the human
body. Use it to answer question 34.
34. (a) During gaseous exchange, gas X leaves the blood vessel and enters the alveolus.
(i)
Name gas X.
………………………………………………………………………… (1)
(ii)
State the process through which gas X enters the alveolus from the blood
vessel.
………………………………………………………………………… (1)
(iii) Name the organ where the alveolus is found.
………………………………………………………………………… (1)
(b) Substance V and gas Y combine to release energy in the body cell.
(i)
Identify substance V.
………………………………………………………………………….. (1)
(ii)
Name the process that releases the energy.
………………………………………………………………………….. (1)
(c) State the function of the nucleus.
…………………………………………………………………………………..
………………………………………………………………………………….. (1)
33
Section A Year 2018 Examinations Questions (Answer Book Page 32-41)
33. Below is a list of some male reproductive system structures and their functions.
Draw a line to match each structure with its function. One has already been done for
you.
35. (a) Label the xylem on the diagram.
(b) State the function of the xylem vessel.
…………………………………………………………………………………..
………………………………………………………………………………….. (1)
(c) A student cut a leaf from a plant to test it for starch.
(i)
State the first step taken when testing a leaf for starch.
…………………………………………………………………………..
………………………………………………………………………….. (1)
(ii)
Give a reason for carrying out the step in (c) (i).
…………………………………………………………………………..
………………………………………………………………………….. (1)
34
The diagram below shows a cross section of a plant leaf, not drawn to scale.
Use it to answer question 35.
35
The diagrams below show some organs of the digestive system labeled S, T, U
and V. use them to answer question 36.
36. (a) (i) Name organ U.
……………………………………………………………………………….. (1)
(ii)
State one function of organ U.
…………………………………………………………………………..
………………………………………………………………………….. (1)
(b) Arrange the organs S, T and V in the sequence in which food reach them after
taking a meal.
(2)
(c) State how food is moved through organ V.
…………………………………………………………………………………..
………………………………………………………………………………….. (1)
(d) Name the enzyme found in the mouth.
………………………………………………………………………………….. (1)
37. (a) From the graph, what is the percentage risk of developing lung cancer for people
who smoke 30 cigarettes per day?
……………………………………………….. % (1)
(b) What conclusion can be made from the graph?
…………………………………………………………………………………..
………………………………………………………………………………….. (2)
(c) Name the substance in cigarette smoke that damages the lungs.
………………………………………………………………………………….. (1)
36
The graph below shows the relationship between the number of cigarettes
smoked and the risk of developing lung cancer. Use it to answer question 37.
37
An element is represented as shown below.
Use it to answer question 38.
𝟐𝟕
𝟏𝟑𝐗
38. (a) Name the element.
…………..……………………………………………………………………… (1)
(b) Complete the table below by stating the number of particles found in an atom of
the element.
Particles
Electrons
Neutrons
Protons
Number of Particles
(3)
(c) Draw the atomic structure of the element.
(2)
39. The sodium metal reacted with one of the gases in the air under the test tube to form
an oxide.
(a) (i) Name the gas which reacted with the sodium metal.
………………………………………………………………………………. (1)
(ii)
Write a word equation for the reaction.
………………………………………………………………………….. (2)
(b) (i) What happened to the water level inside the test-tube after the reaction?
……………………………………………………………………………… (1)
(ii)
Explain your answer to (b) (i).
………………………………………………………………………….. (1)
(c) Give one physical property of water.
………………………………………………………………………………….. (1)
(d) Name one element found in the same group as sodium in a periodic table.
…………………………………………………………………………………. (1)
38
A piece of sodium metal attached to a copper wire was left for a few days as
shown in the diagram below. Use the diagram to answer question 39.
The diagrams below show two types of waves of P and Q. use them to answer
question 40.
(b) State two differences between waves P and Q.
..............................................................................................................................
…………………………………………………………………………………..
…………………………………………………………………………………..
………………………………………………………………………………….. (2)
(c) On wave Q, show and label the wavelength.
(d) Wave P was produced by a guitar string. The string was tightened and it was
struck to produce a sound of the same loudness.
Draw the wave in the axes below to show how it would appear.
(2)
39
40. (a) Define the frequency of a wave.
…………………………………………………………………………………... (1)
41. (a) State whether the speed of the car will increase, decrease or remain constant
when the driving force and the backward force are equal.
……………………………………………………………………………………… (1)
(b) The diagram below shows the forces acting on the car later
Calculate the resultant force on the car and state its direction.
Resultant Force ………………
Direction ……………………... (2)
(c) The mass of the car is 1000 kg.
Calculate the acceleration of the car.
Acceleration ………………………… (2)
(d) At the end of the journey, the driver applied some brakes and the car stopped.
Name the force that caused the car to stop.
………………………………………………………………………………….. (1)
40
The diagram below shows a car moving along a level road.
Use it to answer question 41.
41
The diagram below shows a crane used to lift loads. W is the weight of the
counter weight. Use it the diagram to answer question 42.
42. The crane is in equilibrium.
(a) Tick a box next to the statement which is correct.
If the load is increased the arm moves up.
The turning effect on the arm is zero.
Counter weight is equal to load.
(1)
(b) Calculate the moment of the load about the pivot.
Moment ………………………………… (2)
(c) Calculate force w of the counter weight.
W = …………………………… N (2)
(d) (i) The load is slightly moved to the right. State whether the arm will move up,
move down or does not move.
……………………………………………………………………………… (1)
(ii)
Give a reason for your answer to (d) (i).
…………………………………………………………………………..
………………………………………………………………………….. (1)
42
43. (a) The diagram below shows an electric circuit with current I, I1, I2 and I3.
Calculate the current I2.
I2 = ………………………….. A (2)
(b) Draw a circuit symbol of an ammeter in the space below.
(1)
44. (a) State the meaning of geo-science.
…………..……………………………………………………………………...
…………………………………………………………………………………. (1)
(b) Name the sphere of the earth where rocks are found.
………………………………………………………………………………….. (1)
The diagram below shows a section of a leaf taken from a Plant at 12 noon on a
day with clear skies. Use it to answer question 45.
45. (a) Name the structure that allows movement of air in and out of the leaf.
………………………………………………………...……………………….. (1)
(b) Name gases P and Q.
P ………………………………………………………………………………...
Q ………………………………………………………………………………..
(2)
(c) (i) How does the concentration of the gases P and Q compare at point R in the
leaf?
…………………….……………………………………………………. (1)
(ii)
Give a reason for the answer to (c) (i).
………………………………………………………………………….. (1)
43
Section A Year 2019 Examinations Questions (Answer Book Page 42-53)
Country
V
W
X
Z
Birth rate
36
23
40
43
Death rate
12
16
20
10
Infant mortality rate
120
168
155
70
46. (a) Which country would in 1976 have the
(i)
Greatest population increase?
………………………………………………………………………… (1)
(ii)
Smallest population increase?
………………………………………………………………………… (1)
(b) State two factors in a society which could contribute to a reduction in the birth
rate.
…………………………………………………………………………………..
………………………………………………………………………………….. (2)
44
The table below shows birth rate, death rate, and infant mortality for countries
V, W, X and Z in the year of 1975. Use it to answer question 46.
47. (a) Name two substances which are at a higher concentration in the blood vessel P
than in the blood vessel Q.
…………………………………………………………………………………..
………………………………………………………………………………….. (2)
(b) When the muscle is more active the blood flow will be faster.
How does this benefit the muscle?
…………………………………………………………………………………..
………………………………………………………………………………….. (2)
(c) What type of blood vessel is P?
………………………………………………………………………………….. (1)
45
The diagram below shows some blood vessels in a muscular tissue.
Use it to answer question 47.
48. (a) Name the Instrument.
………………………………………………………………………………… (1)
(b) State any use of the instrument.
………………………………………………………………………………….. (1)
(c) What is the function of the part labeled X?
…………………………………………………………………………………..
………………………………………………………………………………….. (1)
46
The diagram below shows an instrument used in a laboratory.
Use it to answer question 48.
49. (a)
(i)
Name an agent of pollination suitable for the flower.
………………………………………………………………………... (1)
(ii)
Give one reason to the answer in (a) (i).
……………………………………………………………………….... (1)
(b) On the diagram, label with an F, the part that will develop into a fruit after
fertilization.
(1)
(c) Why is important for seeds to be dispersed as widely as possible?
…………………………………………………………………………………..
………………………………………………………………………………….. (2)
47
The diagram below shows a section through a flower.
Use it to answer question 49.
48
50. (a) Below is a list of descriptions of solutions and some pH values.
Draw a line to link each of the described solutions to an appropriate pH value.
One has been done for you.
(3)
(b) Explain why toothpaste contains a weak alkali.
…………………………………………………………………………………..
………………………………………………………………………………….. (1)
51. (a) State and explain what will be observed when the flask is heated.
Observation
………………………………………………………………………………… (1)
Explanation
………………………………………………………………………………… (1)
(b) Suggest why liquid P in the set-up is coloured.
………………………………………………………………………………….. (1)
(c) Which property of gases is being investigated?
………………………………………………………………………………….. (1)
(d) Give one property of gases other than the one being investigated.
………………………………………………………………………………….. (1)
49
The diagram below shows a set-up that was used to investigate a property of
gases. Use it to answer question 51.
52. (a) (i)
On the diagram, draw an arrow to show the force that opposes the motion
of the brick.
(1)
(ii)
Name the force you have drawn on the diagram.
………………………………………………………………………… (1)
(b) What form of energy does the brick lose as it falls?
………………………………………………………………………………….. (1)
(c) Calculate the mass of the 15 N brick. (g=10 N/kg).
Mass …………………………………………. (2)
(d) What happens to the acceleration of the brick as it falls?
………………………………………………………………………………….. (1)
50
The diagram below shows a brick of weight 15 N being released to fall to the
ground. Use it to answer question 52.
53. (a) Name the method of magnetization shown on the diagram.
………………………………………………………………………………… (1)
(b) What observation will be made when the switch is closed and then opened?
Switch closed
…………………………………………………………………………………..
………………………………………………………………………………….. (1)
Switch opened
…………………………………………………………………………………..
………………………………………………………………………………….. (1)
(c) The iron bar is replaced with a steel bar.
What conclusion will be made when the switch is closed and then opened?
Switch closed
…………………………………………………………………………………..
………………………………………………………………………………….. (1)
51
The diagram below shows a method of magnetizing an iron bar.
Use it to answer question 53.
54. (a) Name the component labeled K.
.............................................................................................................................. (1)
(b) Name the type of connection between the resistors R1 and R2.
………………………………………………………………………………….. (1)
(c) Calculate
(i)
The total resistance of the circuit.
Resistance = …………………………. (2)
(ii)
The voltage across R2.
(iii)
The voltage across R1.
Voltage = ………………………… V (2)
Voltage = …………………………. V (1)
52
The diagram below shows an electric circuit. One of the components is labeled K.
use it to answer question 54.
Define temperature.
………………………………………………………………………………… (1)
The diagram below shows thermometers P, Q and R with different features.
Use it to answer question 55(b).
(b) (i)
Using letters P, Q, and R, arrange the thermometers according to their
increasing order of sensitivity in the boxes below.
(2)
(ii)
Identify the thermometer that would have a widest range.
…………………………………………………………………………………. (1)
(c) If the reading in thermometer P is 95℉, what will be the reading in ℃?
𝑇𝑓 =(TC×
9
) + 32 where 𝑇𝑓 is temperature in Fahrenheit and TC is temperature in degrees
5
Celsius.
Reading = ………………………………. ℃ (2)
53
55. (a)
54
56. (a) Describe how fossil fuels were formed.
………………………………………………………………………………………......
…………………………………………………………………………………………..
…………………………………………………………………………………………. (2)
(b) Greenhouse gases have a negative impact to the environment.
State two ways in which the greenhouse gases impact negatively on the environment.
…………………………………………………………………………………………..
………………………………………………………………………………………….. (2)
The Diagram below represents a human sperm cell. Use it to answer question 57.
57.
(a)
(i)
Name the part labeled A.
………………………………………………………………………… (1)
(ii)
State the function of part A.
………………………………………………………………………… (1)
(b) State the importance of the structure of a sperm cell to its function.
………………………………………………………………………………….. (1)
(c) State one structural difference between a human egg cell and a human sperm cell.
………………………………………………………………………………….. (1)
The Diagram below represents a relationship of organisms in a habitat. Some
organisms are identified only as Y and Z. Use it to answer question 58.
58. (a) State the name of the relationship represented by the diagram.
………………………………………………………………………………….. (1)
(b) From the diagram, name an organism which is:
(i)
An omnivore
………………………………………….
55
Section A Year 2020 Examinations Questions (Answer Book Page 54-62)
The diagram below shows a set up used to investigate enzyme action. Use the
diagram and the information below to answer question 59.
Equal amounts of food sample T were placed in each of test tubes W, X and Y. To
test tube W, 2 ml of water was added. To test tube X, 2 ml of amylase solution was
added and to test tube Y, 2 ml of protease was added.
After an hour, the starch test and a protein test were conducted on the contents of test
tubes W, X and Y.
59. (a) (i) Complete the table below to show the results of the food tests. Indicate with a
tick (√) for the presence or a cross (×) for the absence of starch and protein in the test
tubes. W has been done for you.
W
X
Y
Starch
Protein
(ii)
State the colour change that was observed for the protein test in test tube
W.
………………………………………………………………………… (1)
(b) Ina different investigation, the temperature of food sample T was increased to
70℃ and immediately amylase solution was added.
56
(ii)
A carnivore
………………………………………….
(iii) A tertiary consumer
………………………………………….. (3)
(c) State any two long term effects of killing all praying mantises in the habitat.
…………………………………………………………………………………
………………………………………………………………………………… (2)
The diagram below shows a human leg with some parts identified as R, S and T.
Use it to answer question 60.
60. (a) Describe how muscles R and S straighten the leg.
………………………………………………………………………………….. (1)
(b) Name the type of joint at T.
………………………………………………………………………………….. (1)
(c) Name an organ in the human body which is protected by the vertebrae.
………………………………………………………………………………….. (1)
Use the information below to answer question 61.
A student carried out an investigation on a 250 g fresh piece of meat. The fresh piece of meat
contains 100 g of proteins. The student sun-dried the piece of meat and found its mass to be 150
g upon weighing it.
61. (a) Why is the mass of the dried piece of meat different from the mass of fresh piece
of meat?
……………………………………………………………………………………… (1)
(b) How does the amount of protein in dried meat compare to the one in fresh piece of
meat?
………………………………………………………………………………….. (1)
(c) State one reason for drying meat.
………………………………………………………………………………….. (1)
57
Describe the results of this investigation.
………………………………………………………………………………….. (1)
A student collected a water sample from a river. The water sample contained
insoluble clay. The water was too salty. The student used a universal indicator to
determine the pH of the water which he found to be pH 9
62. (a) What was the colour of the universal indicator in the water sample?
………………………………………………………………………………….. (1)
(b) Name a method which can be used to separate the clay from the water sample.
………………………………………………………………………………….. (1)
After removing the clay, the student then heated the salty water to obtain the salts
as shown in the diagram below.
(c) (i) State whether the concentration of the salty water stays the same, increases or
decreases as it is being heated.
………………………………………………………………………………….. (1)
(ii)
Explain your answer to (c) (i).
………………………………………………………………………….. (1)
(d) Explain how the boiling point of salty water compares with that of pure water.
………………………………………………………………………………….
………………………………………………………………………………….. (2)
58
Use the information below to answer question 62.
State the name given to such a mixture of iron and other metals.
………………………………………………………………………………….. (1)
(ii)
Give one example of such a mixture and provide its use apart from
making pots.
Example ………………………………………………………………. (1)
Use ……………………………………………………………………. (1)
59
63. A clean pot of iron was left unused. A reddish-brown layer was formed on the inside
surface of the pot after some time.
(a) Name the reddish-brown layer formed.
………………………………………………………………………………….. (1)
(b) State two other substances that lead to the formation of the reddish-brown layer in
the pot.
…………………………………………………………………………………..
………………………………………………………………………………….. (2)
(c) (i) During manufacturing of pots, iron can be mixed with other metals to prevent
the formation of the reddish-brown layer.
60
The diagram below shows a battery used to power two identical bulbs, B1 and
B2. Use it to answer question 64.
64. (a) Name the type of circuit shown.
………………………………………………………………………………….. (1)
(b) The resistance of each of the bulbs is 6Ω.
Calculate the current through:
(i)
Bulb B1,
Current = ………………………….. A (2)
(ii)
The battery
Current = ………………………. A (2)
(c) Tick (√) in one of the boxes below, to show a fuse suitable for protecting both
bulbs.
3A fuse
5A fuse
10A fuse
(1)
(d) The bulbs give out light.
State another form of energy given out by the bulbs.
………………………………………………………………………………….. (1)
65. (a) (i) Label the focal point of the lens with letter F.
(ii)
Measure the focal length of the lens.
(1)
Focal length= ……………………………… cm (1)
(b) Draw another ray parallel and below the principal axis until it passes through the
lens.
(2)
(c) Name two instruments that use a convex lens.
…………………………………………………………………………………..
………………………………………………………………………………….. (2)
(d) Describe how a rainbow is formed.
…………………………………………………………………………………..
…………………………………………………………………………………..
………………………………………………………………………………….. (2)
61
The diagram shows a ray of light passing through a convex lens. Use it to answer
question 65.
66. (a) Friction force is a vector quantity.
Define a vector quantity.
………………………………………………………………………………… (1)
(b) Calculate:
(i)
The resultant force acting on the cart.
Resultant force= ………………………. N (2)
(ii)
The acceleration of the cart.
Acceleration = ………………………………….. m/s2 (2)
(c) Describe how the speed of the cart changes with time.
……………………………………………………………………………………
……………………………………………………………………………………
………………………………………………………………………………….. (2)
67. Coal is mined and burned to generate electricity.
(a) Give two environmental impacts of mining coal.
…………………………………………………………………………………..
………………………………………………………………………………….. (2)
(b) State the main energy change when coal burns.
…………………………………………………………………………………..
………………………………………………………………………………….. (2)
(c) Name two possible natural disasters that can result from excessive burning of coal
for years.
……………………………………………………………………………………
………………………………………………………………………………….. (2)
62
The diagram below shows a donkey applying a force of 3900 N to pull an 800 kg
cart along a straight line. The frictional force acting on the cart’s motion is 700
N. use it to answer question 66.
(b) State two differences that can be observed between the scales of the
thermometers.
……………………………………………………………………………………
………………………………………………………………………………….. (2)
(c) (i)
State the reading of thermometer X.
(ii)
………………………………. ℃ (1)
Convert the reading in (c) (i) to kelvins.
……………………………….. K (2)
63
Section A Year 2021 Examinations Questions (Answer Book Page 63-72)
68. (a) State the physical quantity measured using a thermometer.
………………………………………………………………………………………………. (1)
The diagram below shows two different thermometers. W and X.
69. (a) Name joint X.
………………………………………………………………………………… (1)
(b) Describe the changes that occur in muscles Y and Z when the arm is straightened.
……………………………………………………………………………………
……………………………………………………………………………………
………………………………………………………………………………….. (2)
The diagram shows a menstrual cycle of a woman during the month of April.
Use it to answer question 70.
Sun
Mon
Tue
Sun
Sun
Sun
Sun
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
Key
Blood flow
Ovulation
30
70. (a) Name the process taking place from the 2nd to the 6th of April.
………………………………………………………………………………… (1)
(b) (i)
On what date will the thickening of the wall of the uterus begin?
……………………………...………………………………………… (1)
(ii)
Give a reason of the thickening of the uterus wall.
………………………………………………………………………….
………………………………………………………………………… (1)
(c) On which dates is the woman likely to be pregnant if she engages in unprotected
sexual intercourse?
………………………………………………………………………………….. (1)
(d) Define safe period.
……………………………………………………………………………………
………………………………………………………………………………….. (1)
64
The diagram below shows the internal structure of a bent human arm with some
parts labeled X, Y and Z. Use it to answer question 69.
71. (a) Name stage 3.
………………………………………….………………………………………. (1)
(b) Name one disease that is transmitted by mosquito.
………………………………………………………………………………….. (1)
(c) State two ways through which the life cycle can be broken at stage 2.
……………………………………………………………………………………
……………………………………………………………………………………
………………………………………………………………………………….. (2)
The diagram below illustrates a reflex arc in humans.
Use it to answer question 72.
72. (a) Draw two arrows (→) in the diagram to indicate the direction in which electrical
impulses are transmitted.
(2)
(b) (i)
Name a part in the diagram which is an effector organ.
………………………………………………………………………… (1)
(ii)
State the function of the effector organ.
………………………………………………………………………… (1)
(c) Name two systems of the body which are responsible for communication.
……………………………………………………………………………………
………………………………………………………………………………….. (2)
65
The diagram below shows the life cycle of a mosquito.
Use it to answer question 71.
Bicarbonate indicator changes from red to yellow as carbon dioxide concentration
increases.
73. (a) (i)
In which jar will the Bicarbonate indicator change from red to yellow?
…………………………………………………..…………………….. (1)
(ii)
Explain your answer to (a) (i) above.
………………………………………………………………………….
………………………………………………………………………… (2)
(b) In which jar will the amount of carbon dioxide decrease?
………………………………………………………………………………….. (1)
(c) State one substance used during the process of respiration.
………………………………………………………………………………….. (1)
66
The diagram below shows a set-up which was used to investigate the relationship
between photosynthesis and respiration.
Use it to answer question 73.
75. (a)
Define reflection.
………………………………………………………………………………… (1)
The diagram below shows a light ray reflected on a plane mirror X.
(b) (i) On the diagram, mark the angle of incidence with i and the angle of reflection
with r.
(2)
(ii)
State one characteristic of an image that could be formed by mirror X.
………………………………………………………………………….
………………………………………………………………………… (1)
67
74. The table below shows melting points and boiling points of different substances X, Y
and Z.
(a) Complete the table by showing the state of matter of each substance at room
temperature (25℃).
State of matter
Melting point
Substance
at room
Boiling point (℃)
(℃)
temperature
X
-183
-88
Y
80
218
Z
-89
118
(3)
(b) Substance Y was found mixed with water.
Name the method of separation which can be used to separate the two.
………………………………………………………………………………….. (1)
(c) Substance Z is dissolved in water.
Explain how this would affect the boiling point of the water.
……………………………………………………………………………………
………………………………………………………………………………......
………………………………………………………………………………….. (2)
(d) Define melting point.
……………………………………………………………………………………
………………………………………………………………………………….. (1)
(c) (i)
Describe how images formed by mirror Y will be different from those
MMM formed by mirror X.
………………………………………………………………...………. (1)
(ii)
Explain your answer in (c) (i).
………………………………………………………………………….
………………………………………………………………………… (1)
76. The table below is on parts of the ear and their functions.
Complete the table by filling in the missing information.
Ear part
Function
Ear flap
Transfers electrical impulses from cochlea to the brain
Ear drum
(3)
77. (a)
The table below shows changes in properties of sound waves.
Complete the table to show how each change affects the sound produced.
Change in wave property
Sound produced
Frequency of the sound wave
increases
The amplitude of the sound wave
decreases
(2)
68
The diagram below shows another mirror Y, with an uneven reflecting surface.
(b)
(i)
(ii)
Who of the two children is likely to hear the sound of the hammer first?
………………………………………………………………………… (1)
Explain your answer in (b) (i).
………………………………………………………………………….
………………………………………………………………………… (1)
78. (a)
Define speed.
………………………………………………………………………………… (1)
The diagram below shows a distance-time graph for a vehicle.
(b) Describe the motion of the vehicle between the times of 3 and 4 hours.
……………………………………………………………………………………
………………………………………………………………………………….. (1)
69
The diagram below shows a builder hitting a wall with a hammer. Two children,
X and Y are standing the same distance from the builder, but on different sides
of the wall.
Speed= ………………………………..km/h (2)
(ii)
State how the air resistance on the car compares with its driving force.
………………………………………………………………………….
………………………………………………………………………… (1)
(d) After the 4th hour, the vehicle travelled for two hours at a constant speed returning
to where it started.
Complete the graph to show the entire motion of the vehicle.
(2)
The diagram below shows a set-up used to magnetise a piece of iron nail.
Use it to answer question 79.
79. (a) Name the type of current flowing in the coiled wire when the switch is closed.
………………………………………………………………………………… (1)
(b) (i)
State the type of magnet produced from the set-up.
………………………………………………………………………… (1)
(ii)
Explain why the nail used should be made of iron to obtain the type of
magnet in (b) (i).
………………………………………………………………………….
………………………………………………………………………… (1)
(c) State one use of magnetic materials.
…………………………………………………………………………………...
………………………………………………………………………………….. (1)
70
(c) (i) Calculate the speed of the vehicle between 0 and 2 hours.
Section B Year 2012 Examinations Questions (Answer Book Page 73-76)
Use the information below to answer question 80.
The table below shows the estimated HIV prevalence in 2004 among women of
different age groups who attended an antenatal clinic in Morula town.
Age group
<20
20-24
25-29
30-34
35-39
40+
(years)
HIV prevalence
12
27
35
30
21
14
(%)
80.
(a) On the grid below, draw a bar chart using the information in the table.
The first bar has been drawn for you.
(b) Which age group has the highest percentage of HIV prevalence among women?
………………………………………………………………………………… (1)
(c) A 27 years old woman attended the Morula antenatal clinic.
What is the percentage chance that the woman is HIV positive?
………………………………………………………………………………… (1)
71
SECTION B
72
(d) Describe the trend of the spread of HIV amongst women attending the antenatal
clinic in Morula town.
…………………………………………………………………………………..
…………………………………………………………………………………..
………………………………………………………………………………….. (2)
(e) Suggest any two reasons why the results of this study may not be a true reflection
of the percentage of women who are HIV positive in Morula town.
…………………………………………………………………………………..
………………………………………………………………………………….. (2)
The diagram shows a set-up used to compare the reaction of calcium with water
and that of barium with water. To make the comparison of the reactions fair, the
mass of barium and the mass of calcium should be the same. The two metals
are found in Group 2 in the Periodic Table.
81.
(a) Name gas Y.
………………………………………………………………………………….. (1)
(b) Suggest two other factors which should be the same to make the comparison fair.
…………………………………………………………………………………..
………………………………………………………………………………….. (2)
(c) After two minutes from the start of the experiment, the plunger of the syringe in the
barium experiment had moved out further than in the calcium experiment.
Explain this observation.
………………………………………………………………………………….. (1)
(d) Which substance other than water can be used in the experiment?
………………………………………………………………………………….. (1)
73
Use the diagram and the information below to answer questions 81 (a) to
(d)
A student was provided with the following apparatus.
•
•
•
•
•
•
•
•
Ruler
Triple-beam balance
250 ml beaker
250 ml measuring cylinder
500 ml of water in a beaker
A string
A metal ball with a hook
A cork
(e) Describe how the volume of the cork can be determined using the apparatus listed
above. You may use diagrams in your description.
………………………………………………………………………………………
………………………………………………………………………………………
………………………………………………………………………………………
………………………………………………………………………………………
………………………………………………………………………………………
………………………………………………………………………………………
………………………………………………………………………………………
………………………………………………………………………………………
………………………………………………………………………………………
(5)
74
Use the information below to answer question 81 (e).
Use the information and the diagram below to answer questions 82 (a) to (c).
The diagram shows a set-up that was used in an experiment to investigate the
relationship between the length of a wire and its resistance. The voltmeter was used to
measure the potential difference across different lengths of the wire. The sliding contact
was initially placed at the 15 cm mark from the end of the wire.
The experiment was repeated by placing the sliding contact at different lengths of the
wire. Some of the results of the experiment are recorded in the table below.
Length
(cm)
0
15.0
30.0
45.0
60.0
90.0
Voltage
(V)
0
2.0
4.0
6.0
8.0
12.0
Resistance
Ώ
0
2
4
8
12
82.
(a) The current in the circuit was 1.0 A.
The resistance of the wire is calculated using the relationship𝑹 =
𝑽
𝑰
.
Complete the table by calculating the resistance of the wire when the sliding contact
was placed at the 45.0 cm mark.
(1)
75
Section B Year 2014 Examinations Questions (Answer Book Page 77-80)
(i)
On the grid below, plot a graph of resistance against length of the wire.
(ii)
Using your graph, find the resistance when the sliding contact is placed at
the 75.0 cm mark. Show your working.
…………………………………………………………………………. (2)
(c)
(i)
What conclusion can be drawn from the investigation?
………………………………………………………………………….
…………………………………………………………………………. (1)
(ii)
State one factor which affects the resistance of a wire apart from its length.
…………………………………………………………………………. (1)
(d) Which instrument is used to measure current?
………………………………………………………………………………….. (1)
76
(b)
83.
(a) Give reasons for carrying out the following steps;
(i)
Boiling the leaf in water in step 1.
………………………………………………………………………… (1)
(ii)
Boiling the leaf in alcohol in step 2.
………………………………………………………………………… (1)
(iii) Switching off the Bunsen burner in step 2.
………………………………………………………………………… (1)
(iv)
State the result for a positive test in step 4.
………………………………………………………………………… (1)
(v)
Explain the results obtained in (iv).
………………………………………………………………………… (1)
77
The diagram below shows steps followed when carrying out a certain test on
a green leaf. Use it to answer question 83 (a).
A student had to separate a mixture of sodium chloride and sand. The student
added water to the mixture and stirred. Sodium chloride dissolved in water.
(b)
(i)
Use the words from the list below to complete the following sentences.
Insoluble Soluble
Solute
Solution
Solvent
Sodium chloride dissolved in water to form a colourless
……………………
The sand did not dissolve because it is ……………………………..in
water.
Sodium chloride is a ………………………. in the experiment.
(3)
(ii)
Name two apparatus that could be used to separate sand from the mixture
of water, sodium chloride and sand.
…………………………………………………………………………
………………………………………………………………………… (2)
78
Use the information below to answer question 83 (b).
Time
(minute)
Oxygen
intake
(dm3 /minute)
0
3
6
9
12
15
18
21
24
27
30
33
0.4
1.6
3.8
4.8
5.0
5.0
5.0
4.2
1.8
0.6
0.4
0.4
(a) On the grid below, plot a graph of oxygen intake against time. (4)
(b) What is the amount of oxygen intake at rest?
………………………………………………………………………………… (1)
(c)
(i)
How much time did the athlete take to complete the race?
……………………………………………………………………….. (1)
(ii)
Explain your answer in (c) (i).
……………………………………………………………………….. (1)
79
Section B Year 2017 Examinations Questions (Answer Book Page 81-83)
84. The intake of oxygen by an athlete was measured at the start, during and after a 5000
m race at time intervals of 3 minutes. The results obtained are shown in the table below.
(i)
From the values below, circle the likely percentage of carbon dioxide in
exhaled air during the race.
0.02%
(ii)
0.04%
4.0%
78.0%
(1)
Explain your answer in (d) (i).
…………………………………………………………………………
…………………………………………………………………………
………………………………………………………………………… (2)
80
(d)
85.
(a) Substance Z is used to speed up the production of oxygen.
Name substance Z.
………………………………………………………………………………………… (1)
(b) What would be the effect of carrying out the experiment at a higher temperature?
………………………………………………………………………………………… (1)
(c) State one property of oxygen that allows it to be collected as shown in the diagram.
………………………………………………………………………………………… (1)
(d) Describe a test that can be performed to confirm that the gas collected is oxygen.
Test: …………………………………………………………………………………
Result: ………………………………………………………………………………… (2)
81
The diagram below shows a set-up used to prepare oxygen.
Use it to answer question 85.
(a) In the table, record the time shown on the stop clock for each timekeeper.
Timekeeper
Thabo
Lizi
Boyce
(2)
Time (s)
(b)
(i)
Who of the timekeepers was not accurate?
………………………………………………………………………… (1)
(ii)
Explain your answer for (b) (i).
………………………………………………………………………… (1)
(c) On the display below, transform the time on the stop clock operated by Thabo to a
digital form.
(1)
82
86. In a 100 m race, three timekeepers Thabo, Lizi and Boyce were assigned to measure the time
taken by an athlete at position 1. Thabo and Lizi started their stop clocks when they saw smoke
from the starter gun. Boyce started his stop clock when he heard the sound of the gun.
The times measured by the three timekeepers are shown on the stop clocks below.
The diagrams show organisms W, X, Y and Z. identification key is given below
the diagrams of the organisms. Use the diagrams and the key to answer question
87 (a).
Identification key:
87. (a) Use the identification key to name the organisms.
W ……………………………………..
X ……………………………………..
Y ……………………………………...
Z ……………………………………...
(4)
(b) State one characteristic of invertebrates.
………………………………………………………………………………….. (1)
83
Section B Year 2018 Examinations Questions (Answer Book Page 84-87)
88. When the lid is closed, there is no dripping and when the lid is open, water drips
through the hole.
(a) What is the name of the quantity that causes water to drip from the tank?
Tick the correct box.
Density
Atmospheric pressure
Terminal velocity
(1)
(b) The farmer used a stopwatch to measure the time between any two drops of water.
The farmer repeated the measurement one more time. The stopwatch was starting
from zero for both measurements.
The display of the measurements are as shown below.
84
The diagram below shows a set-up used by a farmer to investigate the rate at
which water was dripping from a tank with a hole at the bottom.
Use it to answer question 88.
Record the time for the first measurement.
First measurement …………………. Seconds (1)
State one reason why any two measurements are different.
…………………………………………………………………………..
………………………………………………………………………….. (1)
The number of water drops and the time taken were recorded in a table below.
Use it to answer question 88 (c) (i).
(ii)
(c) (i) On the grid below, plot a graph of number of water drops against time taken.
(4)
(ii) The rate at which water was dripping is given by the gradient of the graph.
Determine the rate at which water was dripping from the tank.
Show your working.
Rate of dripping ……………………………………………... (3)
85
(i)
Using the list of apparatus and the materials below, describe a procedure that the
student can follow to obtain copper metal from the mixture. You may use a diagram
to support your answer.
Apparatus: funnel, filter paper, 2 beakers, stirring rod and 150 cm3 of water.
(5)
86
89. A student was asked to separate a mixture consisting of copper metal powder and
sodium chloride powder. Copper metal powder is insoluble in water. Sodium chloride
powder is soluble in water.
A student measured the volume of carbon dioxide gas produced over some time
when a few large pieces of calcium carbonate reacted with excess dilute
hydrochloric acid. The results are given in the table.
Use it to answer question 90.
Time/minutes
0
10
20
30
40
50
60
3
Volume of carbon dioxide/cm
0
27
54
66
100 110
110
90. (a) Plot a graph of the volume of carbon dioxide produced against time on the axes
below. Label the graph Q.
(b) Using your graph, determine the volume of carbon dioxide produced at 15
minutes. Show your working on the graph.
Volume = ……………….. cm3 (2)
(c) Explain why no more carbon dioxide is given off after 50 minutes.
…………………………………………………………………………………..
………………………………………………………………………………….. (1)
(d) At what time is the record of the volume of carbon dioxide produced likely to be
incorrect?
…………………………………………………………………………. minutes (1)
(e) The experiment was repeated with equal amounts of reactants but smaller pieces
of calcium carbonate.
On the same axes, sketch the graph that will be obtained.
Label the graph R.
(2)
87
Section B Year 2019 Examinations Questions (Answer Book Page 88-90)
91. (a) Give one possible source of error in the reading.
………………………………………………………………………………… (1)
(b) Calculate the
(i)
Mass of each marble.
(ii)
Mass = ……………………… g (2)
Density of each marble if the volume of one marble is 2.0 cm3.
Density = ………………… (2)
88
An empty container was placed on top of an electronic balance. The balance was
returned to a zero reading. The diagram below shows the reading obtained after
placing 15 identical marbles into a container on top of the electronic balance. Use
it to answer question 91.
92. (a) (i) Name the substance in saliva that breaks down starch in test tube W.
……………………………………………………………………………… (1)
(ii)
Name the end product of the breakdown of starch in test tube W.
………………………………………………………………………….. (1)
(b) (i) Suggest a suitable temperature for the water bath.
……………………………………………………………………………… (1)
(ii)
Explain your answer at (b) (i).
………………………………………………………………………….. (1)
(c) State the purpose of test tube X in the demonstration.
………………………………………………………………………………….. (1)
89
The diagram below shows a set-up used to demonstrate the breakdown of starch.
Use it to answer question 92.
The table below shows the average daily energy requirements of people of
different ages. Use it to answer question 93.
93. (a) Using information from the table, plot a graph of energy required against age on
the axes given below.
(4)
(b) From the graph, determine the energy requirement of a 10 year old.
Show your working.
………………………………………………………………………………….. (2)
(c) What conclusion can be made from the graph?
…………………………………………………………………………………..
………………………………………………………………………………….. (2)
(d) Define a balanced diet.
…………………………………………………………………………………..
………………………………………………………………………………….. (2)
90
Section B Year 2020 Examinations Questions (Answer Book Page 91-93)
94. The two thermometers show the same reading before the heater is switched on.
(a) Give two other variables that need to be equal at the start of the experiment.
…………………………………………………………………………………..
………………………………………………………………………………….. (2)
The diagram below shows part of the scales for the two thermometers after the
heater was switched on for some time.
(b) Record the temperature readings shown by the thermometers A and B.
Thermometer A = ………………………………
Thermometer B = ………………………………
(2)
(c) What conclusion can be drawn from the experiment?
………………………………………………………………………………….. (1)
91
The diagram below shows a set up used in an experiment to compare heat
absorption between black and white surfaces. Use it to answer question 94.
95. (a) (i) Name the gas that is produced from the reaction.
……………………………………………………………………………… (1)
(ii)
Describe the test for the gas produced from the reaction.
Test
………………………………………………………………………….. (1)
Result
…………………………………………………………………………..
………………………………………………………………………….. (1)
(b) Explain why it is possible to collect the gas produced using the method shown in
the diagram.
………………………………………………………………………………….. (1)
(c) Name one other substance produced during the reaction.
………………………………………………………………………………….. (1)
92
The diagram below shows a set-up used by a student to investigate the reaction
of nitric acid and marble chips, a carbonate.
Use it to answer question 95.
The diagram below shows a set-up that was used to investigate the reaction
between water and metals. Calcium granules of mass 5.0g were reacted with
excess water. Use it to answer question 96.
The mass of the reaction mixture was measured at regular time intervals and the
results were recorded in the table below.
Time/minutes
0
2
4
6
8
10 12 14
Mass of reaction mixture/g 12.0 7.2 4.0 3.8 2.4 2.2 2.2 2.2
93
Section B Year 2021 Examinations Questions (Answer Book Page 94-97)
(4)
(b) Use your graph to determine the mass of reaction mixture after 5 minutes.
Show your working.
Mass of reaction mixture …………………………………..g (2)
(c) An error was made when measuring one of the mass of the reaction mixture.
Use your graph to determine the time when the error was made.
………………………………………………………………………………….. (1)
(d) The experiment was repeated with powdered calcium.
On the same axis sketch the graph that could be obtained.
Label the graph M.
(2)
(e) Why was the mass of the reaction mixture decreasing during the reaction?
……………………………………………………………………………………
………………………………………………………………………………….. (1)
94
96. (a) On the grid below, plot a graph of mass of reaction mixture against time.
Label the graph L.
97. (a) State the colour of the leaf at;
Stage 1
………………………………………………………………………………….
Stage 3
………………………………………………………………………………… (2)
(b) What is the reason for carrying out Stage 2?
……………………………………………………………………………………
………………………………………………………………………………….. (1)
(c) Name the solution used at Stage 4.
………………………………………………………………………………….. (1)
(d) State the observation at Stage 4 that would confirm the presence of starch.
………………………………………………………………………………….. (1)
95
The diagram below shows a set-up used to test for starch in a green leaf.
Use it to answer question 97.
98. (a) Name the component labeled P.
…………………………………………………………………..……………… (1)
(b) The current flowing through the circuit is 0.02 A and the total resistance is 600 Ω.
Calculate the potential difference across one bulb.
Potential difference = ……………………V (2)
(c) One bulb is removed from the circuit.
(i)
State what will happen to the current flowing through the circuit.
………………………………………………………………………….. (1)
(ii)
Explain your answer in (c) (i).
……………………………………………………………………………
………………………………………………………………………….. (1)
96
The diagram below shows an electric circuit with two identical bulbs and an
electric component labeled P. Use it to answer question 98.
97
SelCol
1
II
DATA SHEET
The Periodic Table of the Elements
GROUP
Alkali Metals Alkaline Earth Metals Transition Metals Metalloids Halogens Inert(Rare or Noble)Gases
52
Cr
Chromium
96
Mo
Molybdenum
41
55
Mn
Manganese
Tc
186
Rhenium
Re
Technetium
42
75
144
Nd
Neodymium
60
56
Fe
Iron
101
Ru
190
Osmium
Os
Ruthenium
43
76
Pm
Promethium
61
Np
Neptunium
92
59
Co
Cobalt
103
Rh
Rhodium
192
Ir
Iridium
150
Sm
Samarium
Pu
Plutonium
62
77
44
27
59
Ni
Nickel
106
Pd
195
Pt
152
Eu
Am
Americium
94
Europium
63
Platinum
78
Palladium
46
28
95
64
Cu
Copper
108
Ag
Silver
197
Au
Gold
157
Gd
Curium
Cm
Gadolinium
64
79
47
29
65
Zn
Zinc
112
Cd
201
Hg
Mercury
159
Tb
Terbium
Bk
Berkelium
96
65
80
Cadmium
48
30
5
III
11
B
Boron
27
Al
70
Ga
Gallium
115
In
Indium
204
Tl
Thalium
162
Dy
Cf
6
14
IV
12
C
Carbon
28
Si
Silicon
73
Ge
119
207
Lead
Pb
Tin
Sn
Germanium
32
50
82
165
Ho
Es
Holmium
67
98
Californium Einsteinium
97
Dysprosium
66
81
49
31
Aluminium
13
7
V
14
N
Nitrogen
31
P
75
As
Asenic
122
Sb
209
Bi
Bismuth
167
Er
Erbium
Fm
Fermium
99
68
83
Antimony
51
33
Phosphorus
15
8
VI
16
O
Oxygen
32
S
Sulphur
79
Se
128
Te
Po
169
Tm
Thalium
Md
Mendelevium
100
69
Polonium
84
Tellurium
52
Selenium
34
16
9
VII
19
F
Fluorine
35.5
Cl
Chlorine
80
Br
Bromine
127
I
Iodine
At
Astatine
173
Yb
No
Nobelium
101
Ytterbium
70
84
53
34
17
0
4
Ne
Neon
40
Ar
Argon
84
Kr
Krypton
Xe
131
Xenon
Rn
Radon
175
Lu
Lr
Lawrencium
102
Lutetium
71
85
54
35
18
10
Period
51
V
93
Niobium
Nb
Vanandium
40
184
W
Tungsten
74
141
Pr
Praseodymium
59
238
U
Uranium
26
He
48
Ti
91
Zirconium
Zr
Titanium
39
181
Ta
Tantalum
73
140
Ce
Cerium
Pa
25
H
9
Be
Berylium
45
Sc
Scandium
89
Y
Yttrium
178
Hf
Hafnium
72
58
232
Th
92
93
Protactinium
91
90
Thorium
24
I
1
4
24
Mg
40
Calcium
Ca
Magnesium
12
20
38
139
La
Actinium
Ac
227
Lanthanium
57
89
23
1
7
Li
Lithium
23
Na
Sodium
39
K
Pottasium
88
Sr
137
226
Radium
Ra
Barium
Ba
Strontium
38
56
88
22
2 Helium
20
3
11
19
85
Rb
133
Caesium
Cs
Rubidium
37
55
Fr
Francium
87
a= relative atomic mass
X= AtomicSymbol
b= proton number(atomic number)
Lanthonides
a
X
Actinides
b
21
1 Hydrogen
2
3
4
5
6
7
Key
𝟑
at room temperature and pressure (r.t.p).
The volume of one mole of any gas is 𝟐