Question 1

Study the classification chart below. Which of the following best represents things A, B and C?

Accepted Answer

D. chameleon / moss / sand. A must be an animal, B must be a plant, C must be a non-living thing. Only option (4) fits: chameleon is an animal, moss is a non-flowering plant, and sand is non-living. Toadstool/mushroom/yeast are fungi (not plants), and seeds/tadpoles are living, so the other options fail.

Question 2

Aminah saw a bird on a tree. She walked near the bird and it flew away immediately. Which characteristic of living things does the bird show?

Accepted Answer

C. Living things can respond to changes.. The bird flew away when Aminah approached — it detected the change in its surroundings (Aminah's movement) and responded to that stimulus. This shows the characteristic that living things can respond to changes/stimuli.

Question 3

Study the diagram below. Which one of the following statements about group X and Y is true?

Accepted Answer

B. Only the things in group Y can reproduce.. Group X (kite, balloon) are non-living things — they cannot grow, reproduce, or need air. Group Y (tree, cat) are living things — both can reproduce. Therefore only group Y can reproduce, making option (2) correct.

Question 4

Ann, Ben, Cathy and Derrick observed four different plants and made the following statements. Ann: 'The fruit of my plant is sweet and juicy.' Ben: 'My plant is about 20 cm tall.' Cathy: 'The roots of my plant grow deep into the soil.' Derrick: 'My plant has many small leaves.' Based on their statements, which one of the pupils most definitely observed a flowering plant?

Accepted Answer

A. Ann. Only flowering plants produce fruits (which contain seeds). Ann's plant has fruit, so it must be a flowering plant. Height, root depth, and leaves can apply to both flowering and non-flowering plants.

Question 5

Deanna observed organism X in a park. She recorded her observations below: 'It has moist skin. It has webbed feet. It lays eggs in water. It lives on land and in water.' Which animal group does organism X belong to?

Accepted Answer

D. amphibian. Moist skin, webbed feet, eggs laid in water, and the ability to live both on land and in water are all defining characteristics of amphibians (such as frogs). Fish live only in water, birds and reptiles have dry skin/feathers/scales.

Question 6

The diagram below shows a young plant. Which of the following graphs A, B or C show the changes in the mass of the young plant and its seed leaves over time?

Accepted Answer

A. Young plant: A, Seed leaves: B. As the young plant grows it gains mass over time → matches Graph A (increasing line). The seed leaves provide food to the young plant and shrink over time as the food is used up → matches Graph B (decreasing curve). So young plant = A, seed leaves = B.

Question 7

Study the flowchart below. Which of the following best represents animals D, E, F and G?

Accepted Answer

D. D=butterfly, E=parrot, F=bat, G=guppy. Follow the flowchart: D = has wings, lays eggs, has six legs → an insect that flies and lays eggs → butterfly. E = has wings, lays eggs, NOT six legs → bird → parrot. F = has wings, does NOT lay eggs → mammal with wings → bat. G = no wings, has gills → fish → guppy. Only option (4) fits all four conditions.

Question 8

Which of the following statements about fungi and bacteria is true?

Accepted Answer

C. Some bacteria are useful to humans.. Some bacteria (e.g. those that make yoghurt or aid digestion) are useful to humans, so (3) is true. (1) is wrong — yeast is a fungus, not bacteria. (2) is wrong — fungi are not plants. (4) is wrong — many fungi (e.g. mushrooms, toadstools) are visible without a microscope.

Question 9

Tessa conducted an experiment to find out the conditions affecting mould growth. She placed a slice of apple in three similar containers A, B and C as shown below. In which container(s) A, B and/or C would she most likely observe mould growing on the apple after a few days?

Accepted Answer

B. A and B only. Mould grows in warm, moist conditions. Container A (apple + water, classroom) has both warmth and moisture → mould grows. Container B (apple only, classroom) is warm; the apple itself contains moisture → mould grows. Container C (in the freezer) is too cold for mould to grow. So mould grows in A and B only.

Question 10

Study the diagram below. Which of the following best represents X, Y and Z?

Accepted Answer

A. X=grasshopper, Y=frog, Z=beetle. X = 3-stage life cycle with young that looks like the adult → grasshopper (egg → nymph → adult; nymph resembles adult). Y = 3-stage life cycle with young that does NOT look like the adult → frog (egg → tadpole → adult frog; tadpole differs greatly). Z = 4-stage life cycle → beetle (egg → larva → pupa → adult). Only option (1) fits.

Question 11

Plastic bags to store wet umbrellas on rainy days are often provided at shop entrances to keep the floor dry. Which are the most important properties these plastic bags must have?

Accepted Answer

B. waterproof and flexible. The bag must be waterproof so water from the wet umbrella does not leak out onto the floor. It must also be flexible so the umbrella (of any shape/size) can be slipped easily into the bag. Transparency and lightness are not essential for the main purpose of keeping the floor dry.

Question 12

Jim wanted to test the strength of four materials P, Q, R and S. He hung some weights on material P until it broke. He repeated his experiment with materials Q, R and S and recorded his results in the table below (P=120 g, Q=200 g, R=50 g, S=100 g). Jim wants to hang a flower pot in his garden. Based on his results, which material(s) P, Q, R and/or S can be used to hang the flower pot (flower pot has a mass of 105 g)?

Accepted Answer

B. P or Q only. The flower pot has a mass of 105 g, so the material must hold more than 105 g without breaking. P holds 120 g ✓, Q holds 200 g ✓, R holds 50 g ✗, S holds 100 g ✗ (cannot hold 105 g). Therefore only P or Q can be used.

Question 13

Ali conducted an experiment by moving magnet W towards a paper clip slowly. He measured the distance at which the paper clip was attracted to the magnet (distance d) as shown below. He repeated the experiment with magnets X, Y and Z and recorded the results in the table below (W: 8 cm, X: 6 cm, Y: 9 cm, Z: 4 cm). Based on his results, which magnet W, X, Y or Z has the greatest magnetic strength?

Accepted Answer

C. Y. The stronger the magnet, the greater the distance at which it can attract the paper clip. Magnet Y attracted the paper clip from the greatest distance (9 cm), so Y has the greatest magnetic strength.

Question 14

Gavin was given some ring magnets, a light-weight plastic disc and a wooden holder as shown below. He placed the plastic disc and magnets on top of each other through the wooden holder. Which of the above arrangements A, B, C and D are possible?

Accepted Answer

C. B and D only. Arrangements where ring magnets are stacked with like poles facing each other will cause one magnet to float (repulsion). The plastic disc can rest between repelling magnets or above the top magnet. Arrangements A, C and D show a floating gap that is not consistent with a non-magnetic plastic disc location — only B and D show valid possible stacks where the plastic disc is floating (because the magnets below it are repelling) or arranged consistently. Therefore B and D only.

P3 Science CA2 2025 — CHIJ

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