KS3 Science Book 2 End of Year Assessment
KS3 Science Book 2 End of Year Assessment (Purple Level)
1. What does the term oxygen debt mean? [1 mark]
a) The time it takes to recover after an extended period of exercise
b) The temporary oxygen shortage which occurs after exercise, which is paid back to
eliminate lactic acid
c) The period where your body only uses anaerobic respiration
d) The period of time it takes to get rid of excess carbon dioxide after exercise
2. What range of movements does a ball and socket joint allow? [1 mark]
a) Circular, forward and backwards motion
b) Rotation, forward and backwards motion
c) Circular and Rotation motion
d) Rotation, circular, forward and backwards motion
3. Which of these cells is likely to have the least number of mitochondria compared with the rest? [1
mark]
a) Cells of the gut
b) Muscle cells
c) Sperm cells
d) Red blood cells
4. What is the storage molecule glycogen made from? [1 mark]
a) Glucose
b) Fats
c) Sucrose
d) Starch
5. Leukaemia is a type of cancer that affects bone marrow. What effect does this have on a sufferer’s
immune system and why? [2 marks]
© HarperCollinsPublishers 2014
KS3 Science Book 2 End of Year Assessment
6. Yeast can perform the reaction of aerobic respiration, which produces carbon dioxide. Bakers use this
release of carbon dioxide to help their bread to rise.
A new baker performs an investigation to find out the perfect temperature to get his bread to rise the
furthest. His results are shown in the graph below.
Explain what temperature the new baker should incubate the yeast at and why. What happens above 35
0
C that stops the bread from rising as much? [4 marks]
7. Under what conditions do plants lose the most water during transpiration? [1 mark]
a) Humid, cold and calm
b) Humid, hot and windy
c) Dry, hot and calm
d) Dry, hot and windy
8. Which of these terms is used to define the ability for two or more species to coexist in the same
environment, without competing for the same resources? [1 mark]
a) Specialisation
b) Genetic variation
c) Resource partitioning
d) Generalisation
© HarperCollinsPublishers 2014
KS3 Science Book 2 End of Year Assessment
9. What is one of the main benefits of using manure instead of commercial fertiliser? [1 mark]
a) It releases the minerals more quickly than commercial fertiliser
b) It releases the minerals more slowly than commercial fertiliser
c) It contains higher quantities of minerals than commercial fertiliser
d) Manure is easier to spread on the fields than commercial fertiliser
10. Which of these is not a structure directly involved in the control of water in plants? [1 mark]
a) The stamen
b) Root hairs
c) Stomata and guard cells
d) Xylem
11. In the 1950s, pollution containing mercury entered the ocean at Minamata Bay, Japan, which led to
humans dying after eating contaminated fish. Why did the humans die if the fish they ate were not dead
before they were caught by fishermen? [2 marks]
12. Plants need several reactants to perform photosynthesis correctly. The concentration of carbon
dioxide available to plants affects the rate of photosynthesis. This is demonstrated in the graph.
As the concentration of carbon dioxide rises, so does the rate of photosynthesis – but only to a point.
Then, the rate remains constant. Why does the rate not continue to rise as the concentration of carbon
dioxide rises?
[4 marks]
© HarperCollinsPublishers 2014
KS3 Science Book 2 End of Year Assessment
13. Many metals are silvery-grey and shiny, so look very similar. Finding the density can help you decide
which is which. A block of metal measures 5 x 4 x 2 cm and weighs 288 g. What is its density? [1 mark]
a) 2.88 g/cm3
b) 5.76 g/cm3
c) 7.20 g/cm3
d) 14.4 g/cm3
14. A blood-stained handkerchief is left soaking undisturbed in a bowl of cold water. After an hour, the
stain has gone and all the water is pale pink. Why does this happen? [1 mark]
a) Blood particles mix with water in contact with the stain, and then diffuse throughout
the whole bowl
b) Blood is less dense than water, so it diffuses upwards through the water
c) Blood particles diffuse faster than water, so they quickly spread throughout the bowl
d) The cold water warms up, and the blood particles are diffused by convection currents
15. A thermometer was put in a test tube of liquid, which was then cooled in a beaker of ice. At first the
temperature fell, but then stayed constant for a while before falling further to 0 oC. Why did it stay
constant for a while? [1 mark]
a) The ice stopped cooling the liquid because it was already cold enough to freeze
b) The liquid was warmer than the ice, so it made all the ice melt
c) The liquid must take in latent heat energy to freeze the particles into a solid
d) The liquid gives out latent heat energy as the particles join together to form a solid
16. The level of liquid in a thermometer shows the temperature. How does it work? [1 mark]
a) At higher temperatures the liquid becomes more runny and flows higher up the tube
b) As the temperature increases, the liquid particles vibrate faster and move further, so
the liquid expands
c) At lower temperatures the liquid becomes more dense, so gravity pulls it down more strongly
d) As the temperature decreases, the liquid particles vibrate faster and move further
down the tube
© HarperCollinsPublishers 2014
KS3 Science Book 2 End of Year Assessment
17. Muddy water can be cleaned by filtration. How does this simple diagram use the particle model to
explain filtration? [2 marks]
18. Balloons can be made of rubber or of aluminium-coated plastic. Aluminium atoms are much smaller,
and fit together more tightly, than rubber molecules.
Hydrogen molecules are much smaller and lighter than nitrogen and oxygen molecules. Carbon dioxide
molecules are larger and heavier.
A student investigates diffusion using six balloons – one of each type filled with hydrogen, air and
carbon dioxide.
Predict which balloon will stay inflated the longest, and which will deflate most quickly. Use particle
theory to explain why. [4 marks]
19. Which one of the following statements is correct? [1 mark]
a) Acids have higher pH values than alkalis
b) Acids are hydrogen compounds; alkalis are hydroxides
c) Acids are hydroxides; alkalis are hydrogen compounds
d) Acids feel soapy; alkalis have a sour taste
© HarperCollinsPublishers 2014
KS3 Science Book 2 End of Year Assessment
20. Why is Universal Indicator more useful than single indicators such as litmus or red cabbage juice? [1
mark]
a) The colours of single indicators in acid and alkali are more difficult to distinguish
b) The colour changes of Universal Indicator follow the order of a rainbow, so are easy
to remember
c) The colour changes of Universal Indicator show how strong or weak an acid or alkali is
d) Litmus and cabbage juice are natural products, but Universal Indicator is man-made
21. Which equation correctly describes the reaction between zinc and sulfuric acid? [1 mark]
a) Zinc + sulfuric acid → zinc sulfate + hydrogen
b) Zinc + sulfuric acid → zinc sulfate + water
c) Zinc + sulfuric acid → zinc sulfate + water + hydrogen
d) Zinc + sulfuric acid → zinc sulfate + carbon dioxide
22. Which of the following would not neutralise nitric acid to give magnesium nitrate? [1 mark]
a) Magnesium oxide
b) Magnesium hydroxide
c) Magnesium chloride
d) Magnesium carbonate
23. The combustion products from a Bunsen flame depend on whether the air-hole is open or closed.
Explain why. [2 marks]
24. Wood burns leaving ash, which weighs less than the wood did at the start. Candles and petrol burn
leaving no ash at all. Explain why these reactions do not really break the Law of Conservation of Mass as
they seem to do.
[4 marks]
© HarperCollinsPublishers 2014
KS3 Science Book 2 End of Year Assessment
25. An 8 N block displaces 3 N of water when totally submerged. Which of these statements is true? [1
mark]
a) Its apparent weight in water is 5 N and the upthrust is 8 N
b) Its apparent weight in water is 5 N and the upthrust is 3 N
c) The upthrust is 5 N and its apparent weight in water is 5 N
d) The upthrust is 3 N and its apparent weight in water is 8 N
26. Which of these statements about gravity is true? [1 mark]
a) Gravity acts downwards from the North Pole towards Australia
b) Gravitational field lines are closer together as you move closer to the Earth’s surface
c) Gravity stops at the Earth’s surface
d) Gravitational field is responsible for the Northern Lights, the Aurora Borealis
27. Which combination of force and area will produce the greatest pressure? [1 mark]
a) Force = 300 N, Area = 2 m2
b) Force = 3000 N, Area = 15 m2
c) Force = 6000 N, Area = 20 m2
d) Force = 9000 N, Area = 45 m2
28. Why does a rubbed balloon stick to the wall? [1 mark]
a) The balloon is negatively charged and the wall is positively charged
b) The balloon is negatively charged and the wall is neutral
c) The balloon is negatively charged which repels the positively charged
particles of the wall atoms and so is attracted to the wall
d) The balloon is negatively charged which repels the negatively charged particles of
the wall atoms, leaving the wall’s surface with a positive charge which attracts the balloon
29. Explain why a spacecraft, such as Voyager 2, needs only tiny thrusters to control its direction. [2
marks]
© HarperCollinsPublishers 2014
KS3 Science Book 2 End of Year Assessment
30. Explain the changes to an astronaut’s weight and movement when on a planet of twice the mass of
the Earth and half its size. [4 marks]
31. Six metals are listed in order of their reactivity, from most reactive to least reactivate: magnesium,
zinc, iron, tin, lead, copper.
Which combination will produce the highest voltage when used in a fruit battery? [1 mark]
a) Magnesium and Zinc
b) Lead and Copper
c) Zinc and Lead
d) Magnesium and Lead
32. Which of these sentences best describes a domestic ring main? [1 mark]
a) A series circuit with 230 V across all the sockets
b) A series circuit with 12 V across all the sockets
c) A parallel circuit with 230 V across all the sockets
d) A parallel circuit with 12 V across all the sockets
33. In a D.C. motor used in a drill, which of these actions will produce the greatest increase in speed? [1
mark]
a) Increasing the current and the number of coils; decreasing the strength of the magnet
b) Increasing the current and the strength of the magnet; decreasing the number of coils
c) Increasing the strength of the magnet; decreasing the number of coils and the current
d) Increasing the current; the strength of the magnet and the number of coils
34. Which component has the highest resistance, based on the voltage and current readings shown? [1
mark]
a) A heater (240 V, 6 A)
b) An electric drill (240 V, 2 A)
c) A light bulb (12 V, 2 A)
d) A carbon rod (3 V, 0.03 A)
© HarperCollinsPublishers 2014
KS3 Science Book 2 End of Year Assessment
35. Mrs Jenkins is using the model of water flowing around a circuit to explain an electric circuit works.
Suggest how well it represents a circuit. [4 marks]
36. Use domain theory to explain how heating a bar magnet destroys its magnetism. [2 marks]
© HarperCollinsPublishers 2014