Question 1

Which of the following animals is a reptile?

Accepted Answer

(2). Image (2) shows an alligator or crocodile, which is a reptile. Fish (1), ostrich (3, a bird), and sheep (4, a mammal) are not reptiles.

Question 2

Which of the following are characteristics of insects?
A They have six legs.
B They have six body parts.
C They have a hard outer covering.

Accepted Answer

(2) A and C only. Insects have three pairs of legs (six legs total, characteristic A) and an exoskeleton (hard outer covering, characteristic C). They have three main body parts (head, thorax, abdomen), not six body parts (characteristic B). Therefore, A and C are correct characteristics.

Question 3

Which of the following animals have a 4-stage life cycle?

Accepted Answer

(3) A and C only. A butterfly (A) undergoes complete metamorphosis, which is a 4-stage life cycle (egg, larva, pupa, adult). A beetle (C) also undergoes complete metamorphosis (4-stage life cycle). A cockroach (B) undergoes incomplete metamorphosis, which is a 3-stage life cycle (egg, nymph, adult). Therefore, A and C have a 4-stage life cycle.

Question 4

Which part of the plant, P, Q, R, or S, helps the plant to make food?

Accepted Answer

(3) R. Photosynthesis, the process by which plants make food, primarily occurs in the leaves. In the diagram, R points to the leaves.

Question 5

Study the flow chart below.
Three animals have been classified based on their characteristics.
Based on the flowchart given, which of the following is correct?

Accepted Answer

(4) Does it give birth to its young alive? | Fish. Let's analyze option (4): If Question M is 'Does it give birth to its young alive?', then 'Yes' leads to Mammal (correct). If 'No', it proceeds to 'Does it have fins?'. If 'Yes', it leads to Animal X which is a Fish (correct, fish have fins and do not give live birth). If 'No', it leads to Bird (correct, birds do not have fins and do not give live birth). This classification is consistent with biological facts.

Question 6

Mrs. Tan used a metal spoon to stir her hot Milo as shown below.
The spoon became hot after a while.
Which of the following explains this?

Accepted Answer

(3) The spoon gained heat from the hot Milo.. Heat transfers from a hotter object to a colder object. The hot Milo is hotter than the spoon, so the spoon gains heat from the hot Milo, causing it to become hot.

Question 7

The diagram shows a wooden ball and a plastic ball on both ends of a lever balance.
Based on the diagram, we can conclude that the wooden ball and the plastic ball have ____

Accepted Answer

(3) the same mass but different volume. Since the lever balance is level, it indicates that the masses of the objects on both pans are equal. Visually, the wooden ball is significantly smaller than the plastic ball, meaning they have different volumes. Therefore, they have the same mass but different volumes.

P4 Science CA1 2025 — Henry Park

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