Question 1

Study the table below.

Which one of the above was classified wrongly?

Accepted Answer

D. hibiscus. A hibiscus is a flowering plant, which is a living thing. It was wrongly classified under non-living things.

Question 2

Which of the following has hair as its outer body covering?

Accepted Answer

C. mammal. Mammals are characterised by having hair or fur as their outer body covering. Insects have an exoskeleton, reptiles have scales, and amphibians have moist skin.

Question 3

Study the diagram of plant X shown below.

Plant X needs a wooden pole for support because it ____.
A: has a weak stem
B: needs to absorb more water
C: needs to reach up for more sunlight

Accepted Answer

B. A and C only. A plant with a weak stem needs support such as a wooden pole to hold it upright (A). It also needs to climb up so its leaves can reach sunlight for photosynthesis (C). Roots, not the pole, help with water absorption, so B is incorrect.

Question 4

The table below shows the characteristics of four animals.

Which one of the following animals in the table is correctly described?

Accepted Answer

A. bird. A bird does not have six legs, has feathers, and does not feed its young with milk — this row is correctly described. Fish do not have six legs. Insects do not feed their young with milk. Mammals do not have feathers.

Question 5

Which of the following organs is not part of the human respiratory system?

Accepted Answer

C. heart. The respiratory system consists of the nose, windpipe and lungs. The heart belongs to the circulatory system, not the respiratory system.

Question 6

The diagram below shows one of the human body systems.

Some students shared statements about this human body system.
Abu: It helps to give us shape.
Ben: It helps to support our body.
Caela: It helps to protect the important organs in our body.
David: It helps to transport food and water to all parts of our body.

Which student made an incorrect statement?

Accepted Answer

D. David. The diagram shows the skeletal system. The skeletal system gives shape, supports the body and protects important organs. It does NOT transport food and water — that is the job of the circulatory and digestive systems — so David's statement is incorrect.

Question 7

The diagram below shows a plant.

Which part of the plant, A, B, C or D, helps to hold the plant firmly to the ground?

Accepted Answer

D. D. The roots hold a plant firmly to the ground. In the diagram, D points to the roots underground. A points to the flower, B to the stem and C to a leaf.

Question 8

The diagram below shows one of the organs in the human digestive system.

Which of the following information about the organ is correct?

Accepted Answer

C. Large Intestine — Digestion of food takes place here: No — Water is absorbed: Yes. The diagram shows the large intestine. Digestion of food does NOT take place in the large intestine; its main role is to absorb water from undigested food before the waste leaves the body.

Question 9

Study the flow chart below.

Which parts of a plant do P, Q and R represent?

Accepted Answer

A. P: stem, Q: root, R: leaf. The stem holds a plant upright and provides support, so P is the stem. The root takes in water and mineral salts from the soil, so Q is the root. The remaining part R is the leaf.

Question 10

The diagram shows a measuring tape. The measuring tape is used to measure the lengths of different objects.

The table below shows the properties of four materials, A, B, C and D. A tick (✓) indicates that the material has the property and a cross (✗) indicates that the material does not have that property.

Based on the properties shown above, which material is most suitable to make the measuring tape?

Accepted Answer

A. A. A measuring tape must be strong (so it does not break easily) and flexible (so it can be rolled up and bent around objects). Only material A has both properties.

Question 11

Susan hung metal clips to the poles of each magnet until the last clip could not be hung any more. The diagrams below show the results of her experiment.

Which bar magnet has the weakest magnetic strength?

Accepted Answer

D. D. The more metal clips a magnet can hold, the stronger it is. The magnet that holds the fewest clips at its poles has the weakest magnetic strength, which is bar magnet D.

Question 12

Leah hung a magnet as shown in the diagram below. She gave the magnet a gentle push. The magnet turned and eventually stopped.

In which direction would the magnet come to a rest?

Accepted Answer

D. north-south. A freely suspended bar magnet always comes to rest pointing in the north–south direction, with its north pole pointing geographic north.

Question 13

Jun Hong wanted to turn an iron nail into a temporary magnet. He used a bar magnet to stroke the iron nail in the same direction repeatedly as shown in the diagram.

What will the poles of the temporary magnet be at points A and B?

Accepted Answer

B. A: South, B: North. In the stroking method, the end of the nail where the magnet leaves becomes the opposite pole to the stroking pole. The south-pole of the magnet is used to stroke from A toward B, lifting off at B. Therefore B becomes a North pole and A becomes a South pole.

Question 14

Linda placed two bar magnets next to each other. She drew four observations as seen in the diagrams below. She indicated the North-pole of the magnet with the letter 'N'. The arrows show the movement of the magnets towards or away from each other.

Which of the following diagrams shows the correct observation?

Accepted Answer

C. Two bar magnets with N poles facing each other (N | N), arrows showing them moving apart. Like poles repel each other. When the two North poles face each other, the magnets push apart. Option C correctly shows two N poles facing each other with arrows pointing away from each other.

Question 15

Shaun wanted to find out if the number of coils around an iron rod would affect the strength of the electromagnet. He set up the experiment as shown in the diagram below.

Shaun repeated the experiment with three other set-ups with different number of coils around the iron rod. He recorded the results in the table below.

Which set-up likely had the most number of coils around the iron rod?

Accepted Answer

B. Q. The more coils of wire around the iron rod, the stronger the electromagnet, and the more pins it can attract. Set-up Q attracted the most pins (17), so it likely had the most coils.

P3 Science CA2 2025 — Red Swastika

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