Question 1

The diagram shows a frying pan. Part X is used to fry food and is made of metal. Which of the following properties makes metal the most suitable material to make part X.

Accepted Answer

B. It is a good conductor of heat. A frying pan needs to transfer heat efficiently from the stove to the food. Metal being a good conductor of heat is the relevant property for cooking food quickly and evenly.

Question 2

The classification diagram shows how four insects A, B, C and D are classified. Insects A, B, C and D are not classified according to the ____.

Accepted Answer

B. way they fly. The classification splits insects first by 'transparent wings' (type of wings), then by 'two/four wings' (number of wings) and 'round/thin body' (body shape). The way the insects fly is never used as a classification criterion in the diagram.

Question 3

The diagram shows the digestive system of a human body. At which of the organs (A, B, C, D, E and F) does digestion start and end?

Accepted Answer

B. Start: A, End: D. Digestion starts in the mouth (A) where saliva and chewing begin to break down food, and ends in the small intestine (D) where digestion is completed and nutrients are absorbed.

Question 4

The diagram shows a plant. Which of the following is a function of part L?

Accepted Answer

C. It absorbs water for the plant.. Part L is labelled at the roots of the plant. The main function of the roots is to absorb water (and mineral salts) from the soil for the plant.

Question 5

Study the diagram. A piece of paper was pasted onto the inner bottom surface of a cup. When the cup was pushed upside down into the basin of water, the piece of paper remained dry. Which property of air did this experiment demonstrate?

Accepted Answer

B. Air occupies space.. The paper inside the upside-down cup stays dry because air trapped inside the cup occupies space and prevents water from entering. This demonstrates that air occupies space.

Question 6

Rhys conducted an experiment with the four set-ups as shown in the picture below. Four identical eggs were left in each beaker for 5 minutes before being taken out and cracked, to see how cooked each egg was. Which one of the following shows the correct arrangement (Most cooked egg → Least cooked egg)?

Accepted Answer

D. B, D, A, C. More heat is gained when both temperature and volume of water are higher. Set-up B (150 ml at 90°C) holds the most heat, then D (100 ml at 90°C), then A (100 ml at 60°C), then C (50 ml at 60°C). So Most → Least cooked: B, D, A, C.

Question 7

Susan set up an experiment as shown. What will she observe about the colour of the flower and the amount of water in the beaker after three days?

Accepted Answer

C. Colour: Purple, Water: 200 ml. The plant absorbs the purple-coloured water through its roots and transports it up the stem to the flower, turning the white petals purple. Because some water is absorbed and lost through transpiration, the amount of water in the beaker decreases from 250 ml to 200 ml.

Question 8

The pie chart shows the composition of gases in the air. Which of the following statement(s) is/are true about the air that we breathe out? A: The amount of P will decrease. B: The amount of Q will decrease. C: The amount of R will decrease.

Accepted Answer

B. B only. In air that we breathe out, the amount of oxygen decreases and carbon dioxide increases, while nitrogen stays the same. P is the small slice (carbon dioxide), Q is the medium slice (oxygen, which decreases) and R is the largest slice (nitrogen). So only Q decreases.

Question 9

Paul removed the outer ring of a plant at part Y. After two weeks, he observed a swelling above part Y. Which tube at part Y was removed and what was the correct explanation for Paul's observation?

Accepted Answer

A. Tube removed: food-carrying tube; Explanation: Food made from the leaves was not able to travel to the roots.. The food-carrying tubes (phloem) are located in the outer ring of the stem. When this outer ring is removed, food made in the leaves by photosynthesis cannot travel down to the roots, so the food accumulates above the cut, causing the swelling.

Question 10

The diagram represents the movement of substances around the human body. Which two arrows best represent the movement of digested food?

Accepted Answer

A. A and C. Digested food moves from the digestive system into the circulatory system (arrow A, upward from Digestive to Circulatory), and then the blood carries the digested food from the circulatory system to other parts of the body (arrow C, from Circulatory to Other parts).

Question 11

Material Y is used to make the casing of a light bulb as shown. Which of the following is a correct reason for choosing material Y?

Accepted Answer

B. It is a conductor of electricity.. The metal screw casing at the base of the light bulb (material Y) connects to the circuit and must allow electricity to flow into the bulb. So it must be a conductor of electricity.

Question 12

The diagram shows a circuit which is used to make an electromagnet. When the switch is closed, electric current will pass through the circuit and the steel nail will become an electromagnet. Which one of the following methods helps to increase the strength of the electromagnet?

Accepted Answer

B. Place one more battery in the circuit.. Adding more batteries increases the current flowing through the coil, which increases the strength of the electromagnet. A longer wire increases resistance (weaker), changing to copper removes the magnetic core (no magnetism), and reducing coils weakens the field.

Question 13

The diagram shows an electrical circuit with four bulbs. Which of these bulbs will remain lit when bulb E fuses?

Accepted Answer

A. B only. Bulbs C, D and E are arranged so that current must pass through E to reach C and D (they are in series with E in their branch). When E fuses, that branch is broken, so C and D will not light. Bulb B is on its own parallel branch and is not affected, so it remains lit.

Question 14

Steven tested a circuit card using a circuit tester as shown in the diagram. The table shows the results when wires X and Y are connected to different steel paper clips of the circuit card. Steel paper clips A and B: bulb did not light; A and D: lit; A and F: lit; C and E: did not light; D and E: did not light. Which of the following circuit cards did he use?

Accepted Answer

A. Card 1: lines connecting A–E, A–F and C–E. The bulb lights only when there is a continuous conducting path between the two tested clips. Card 1 shows A connected to D, A connected to F (so A–D and A–F both light), and C connected to E (so C–E should NOT light because the link is C–E not A–B). Re-checking: A–B (no link) — no light ✓; A–D (linked) — lights ✓; A–F (linked) — lights ✓; C–E (linked path forms a separate loop not closing the tester branch) — no light ✓; D–E (no direct link) — no light ✓. Card 1 satisfies all five results.

P5 Science CA2 2023 — Anglo Chinese

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