P3 Science CA2 2025 — Rosyth

Q: What can you observe about the magnetic strength of magnets A and B? Tick (✔) your answer in the box below: Magnet A is as strong as Magnet B. Magnet A is stronger than Magnet B. Magnet B is stronger than Magnet A.

A. Magnet A is as strong as Magnet B.. The explanation for the previous part (Task 2e) states that 'Magnet A and B attracted the paper clip at equal length'. This means both magnets were able to attract the paper clip from the same distance, indicating they have the same magnetic strength.

Q: Lisa tied a bar magnet to a string. She held the string and moved the magnet as shown below. In which direction will the freely suspended magnet point to when it comes to rest? (1) North-East (2) North-South (3) East-West (4) South-West

B. North-South. A fundamental property of magnets is that when freely suspended and allowed to come to rest, they will align themselves with the Earth's magnetic field, pointing towards the Earth's magnetic North and South poles. Thus, a freely suspended magnet always points in the North-South direction.

Q: Mr Kong placed three rings, A, B and C into a holder. The rings came to rest in the positions as shown in the diagram below. Based on the diagram, which of the rings are definitely magnets? (1) A and B (2) A and C (3) B and C (4) A, B and C

C. B and C. The diagram shows a 'holder' (likely a magnet) attracting ring B, and ring B attracting ring C, forming a stable chain. While attraction can occur between a magnet and a magnetic material (induced magnetism), for objects to be 'definitely magnets' in a chain of attraction like this, especially with distinct spacing, it often implies they possess their own permanent magnetic properties. Repulsion is the only *sure* test of magnetism, but in the context of a stable attraction chain in primary science, B and C attracting each other this way suggests they are magnets. Ring A is shown above B, not explicitly forming part of the direct attraction chain, so it is not definitely a magnet based on this diagram alone.

Q: Adrian set up an experiment as shown below to remove objects X and Y from a container of sand using a bar magnet. Based on Adrian's results, which of the following are objects X and Y? (1) iron ball aluminium ball (2) steel ball iron ball (3) wooden ball iron ball (4) aluminium ball wooden ball

A. iron ball aluminium ball. The diagram indicates that the magnet attracts 'object X' (solid black circles) but does not attract 'object Y' (empty circles). Magnetic materials like iron and steel are attracted to magnets, while non-magnetic materials like aluminium and wood are not. Therefore, object X must be a magnetic material, and object Y must be a non-magnetic material. Option (1) correctly pairs an iron ball (magnetic) for X and an aluminium ball (non-magnetic) for Y.

P3 Science 2025 CA2 14 questions 20 marks

Source: Rosyth, 2025

This P3 Science CA2 paper from Rosyth (2025) contains 14 questions worth 20 marks. Use it as a study reference for Science topics typically tested at P3 level in Singapore schools.

Q1 Structured 2 marks 🖼 Visual

Put a tick (v) if the object moved towards magnet A and (X) if the object did not move.

Q2 Structured 2 marks 🖼 Visual

Based on your experimental results in (a), classify the objects, P, Q, R and S in the table below.

Q3 Structured 1 mark 🖼 Visual

P, Q, R and S, can also be classified as shown in the classification chart below. Study the classification chart and suggest suitable headings.

Q4 Structured 1 mark 🖼 Visual

Mark out the readings on the printed ruler in Diagram 2 at which the paper clip started to move towards magnets A and B. Label 'A' and 'B' for the respective marking.

Q5 Structured 1 mark

Circle the correct answer to complete the following statement. To find out if the ( size / colour / position) of the magnets affects their magnetic strength

Q6 Structured 1 mark

Based on your observations, circle the correct answer to complete the following statement. The paper clip moved as the magnets ( attracted / repelled) it.

Q7 MCQ 1 mark 🖼 Visual

What can you observe about the magnetic strength of magnets A and B? Tick (✔) your answer in the box below: Magnet A is as strong as Magnet B. Magnet A is stronger than Magnet B. Magnet B is stronger than Magnet A.

Q8 Open-ended 1 mark

Explain your answer in (d).

Q9 MCQ 2 marks 🖼 Visual

Lisa tied a bar magnet to a string. She held the string and moved the magnet as shown below. In which direction will the freely suspended magnet point to when it comes to rest? (1) North-East (2) North-South (3) East-West (4) South-West

Q10 MCQ 2 marks 🖼 Visual

Mr Kong placed three rings, A, B and C into a holder. The rings came to rest in the positions as shown in the diagram below. Based on the diagram, which of the rings are definitely magnets? (1) A and B (2) A and C (3) B and C (4) A, B and C

Q11 MCQ 2 marks 🖼 Visual

Adrian set up an experiment as shown below to remove objects X and Y from a container of sand using a bar magnet. Based on Adrian's results, which of the following are objects X and Y? (1) iron ball aluminium ball (2) steel ball iron ball (3) wooden ball iron ball (4) aluminium ball wooden ball

Q12 Structured 2 marks 🖼 Visual

A compass has a small magnet that rotates freely as shown below. Mia arranged three similar magnets and placed a compass near the South pole of a magnet, as shown in Diagram 1. She then rearranged the magnets and placed the compass near a different pole of another magnet, as shown in Diagram 2. Based on the diagrams above, fill in the blanks with 'North' or 'South' to identify the poles, Y and Z. (a) Y: (b) Z:

Q13 Open-ended 1 mark 🖼 Visual

State the property of object F that allowed it to float in the air.

Q14 Open-ended 1 mark

If object F is made of plastic, will Sam have the same observation? Explain your answer.

P3 Science CA2 2025 — Rosyth

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