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Primary 4 Science Magnets Quiz

Free P4 Science Magnets quiz, Exam version, with questions, answers, and syllabus-aligned practice for Singapore students.

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Primary 4 Science From Real Exams Generated by DeepSeek V4 Flash Sample 02 Updated 2026-08-17

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Questions

Primary 4 Science Quiz - Magnets

Name: ________________________________________ Class: ________________________________________ Date: ________________________________________ Score: ________ / 30

Duration: 30 minutes Total Marks: 30

Instructions:

This quiz has 20 questions on the topic of Magnets.
Answer all questions in the spaces provided.
For multiple-choice questions, circle the correct option.
For open-ended questions, write your answers clearly in the spaces provided.
Show your working or reasoning where applicable.

Section A: Multiple-Choice Questions (10 questions x 2 marks = 20 marks)

Circle the correct option for each question.

1. Which of the following materials is magnetic? A) Wood B) Plastic C) Iron D) Glass Answer: ________

2. A bar magnet is hung freely by a string. Which direction will the magnet's north pole point towards? A) East B) South C) West D) North Answer: ________

3. Two magnets are brought close to each other. The north pole of one magnet is brought near the south pole of the other magnet. What will happen? A) They will repel each other. B) They will attract each other. C) Nothing will happen. D) They will lose their magnetism. Answer: ________

4. A student has a magnet and a piece of steel. The student rubs the magnet along the steel bar in one direction many times. What will happen to the steel bar? A) It will become a magnet. B) It will lose its mass. C) It will become non-magnetic. D) It will change colour. Answer: ________

5. Which of the following is NOT a way to make a temporary magnet? A) Stroking a steel bar with a magnet. B) Hanging a steel bar near a strong magnet. C) Heating a steel bar strongly. D) Placing a steel bar inside a coil of wire with an electric current. Answer: ________

6. The diagram below shows a magnet and some objects placed near it.

Diagram for Q6 (P4 Science)

Generated diagram for Q6.

Which object will most likely be attracted to the magnet? A) Paper clip B) Eraser C) Brass key D) All of the above Answer: ________

7. A magnet is cut into two pieces. Which of the following statements is true? A) Each piece will have only one pole. B) Each piece will become a complete magnet with both north and south poles. C) The pieces will lose their magnetism. D) Only one piece will be magnetic. Answer: ________

8. Which of the following is a magnetic material? A) Aluminium B) Copper C) Nickel D) Silver Answer: ________

9. A student wants to separate a mixture of iron filings and sand. Which method should the student use? A) Using a sieve B) Using a magnet C) Using water D) Using a filter paper Answer: ________

10. The diagram below shows a compass placed near a bar magnet.

Diagram for Q10 (P4 Science)

Generated diagram for Q10.

Which pole of the compass needle is pointing towards the south pole of the bar magnet? A) North pole B) South pole C) Both poles D) Neither pole Answer: ________

Section B: Open-Ended Questions (10 questions x 1 mark each = 10 marks)

Write your answers in the spaces provided.

11. What is a magnet?

12. Name one object in your home that uses a magnet.

13. What happens when you bring the north pole of one magnet near the north pole of another magnet?

14. What is the name of the force that pulls magnetic objects towards a magnet?

15. Name one material that is NOT attracted to a magnet.

16. How can you make a temporary magnet using a steel paperclip and a bar magnet?

17. What is the difference between a temporary magnet and a permanent magnet?

18. A student has a metal bar. How can the student find out if the metal bar is a magnet?

19. Why is a magnet able to attract a steel nail but not a copper coin?

20. What happens to the magnetism of a magnet when it is heated strongly?

End of Quiz

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Answers

Primary 4 Science Quiz - Magnets: Answer Key

Total Marks: 30

Section A: Multiple-Choice Questions (10 questions x 2 marks = 20 marks)

1. Answer: C) Iron

Explanation: Iron is a magnetic material. Wood, plastic, and glass are non-magnetic materials. Magnetic materials are those that are attracted to a magnet.
Marking: 1 mark for correct answer.

2. Answer: D) North

Explanation: A freely suspended magnet will align itself with the Earth's magnetic field. The north pole of the magnet will point towards the Earth's geographic North Pole.
Marking: 1 mark for correct answer.

3. Answer: B) They will attract each other.

Explanation: Opposite poles of a magnet attract each other. The north pole of one magnet and the south pole of another magnet will attract.
Marking: 1 mark for correct answer.

4. Answer: A) It will become a magnet.

Explanation: Stroking a steel bar with a magnet in one direction aligns the magnetic domains in the steel, making it a temporary magnet. This is called magnetization by stroking.
Marking: 1 mark for correct answer.

5. Answer: C) Heating a steel bar strongly.

Explanation: Heating a steel bar strongly will destroy its magnetism, not create it. Stroking, hanging near a strong magnet, and using an electric current are all ways to make a temporary magnet.
Marking: 1 mark for correct answer.

6. Answer: A) Paper clip

Explanation: A paper clip is made of steel, which is a magnetic material. The eraser and brass key are non-magnetic. The steel nail is also magnetic, but the question asks for the object that will "most likely" be attracted, and the paper clip is the most common example.
Marking: 1 mark for correct answer.

7. Answer: B) Each piece will become a complete magnet with both north and south poles.

Explanation: When a magnet is cut, each piece becomes a smaller magnet with its own north and south poles. This is because the magnetic domains are still aligned within each piece.
Marking: 1 mark for correct answer.

8. Answer: C) Nickel

Explanation: Nickel is a magnetic material. Aluminium, copper, and silver are non-magnetic materials.
Marking: 1 mark for correct answer.

9. Answer: B) Using a magnet

Explanation: Iron filings are magnetic, while sand is not. A magnet can be used to attract and separate the iron filings from the sand.
Marking: 1 mark for correct answer.

10. Answer: A) North pole

Explanation: Opposite poles attract. The south pole of the bar magnet attracts the north pole of the compass needle. Therefore, the north pole of the compass needle is pointing towards the south pole of the bar magnet.
Marking: 1 mark for correct answer.

Section B: Open-Ended Questions (10 questions x 1 mark each = 10 marks)

11. Answer: A magnet is an object that produces a magnetic field and attracts magnetic materials like iron, steel, nickel, and cobalt.

Explanation: This is a basic definition. A magnet has a north pole and a south pole.
Marking: 1 mark for a correct definition.

12. Answer: (Any one of the following) Refrigerator door, speaker, compass, magnetic catch on a cabinet door, magnetic toy.

Explanation: Many everyday objects use magnets. The refrigerator door uses a magnet to seal shut. Speakers use magnets to produce sound.
Marking: 1 mark for a correct example.

13. Answer: They will repel each other.

Explanation: Like poles repel. Two north poles will push away from each other.
Marking: 1 mark for correct answer.

14. Answer: Magnetic force.

Explanation: The magnetic force is the force that attracts magnetic objects to a magnet. It is a non-contact force.
Marking: 1 mark for correct answer.

15. Answer: (Any one of the following) Wood, plastic, glass, paper, aluminium, copper, brass, silver, gold.

Explanation: Non-magnetic materials are not attracted to magnets.
Marking: 1 mark for a correct example.

16. Answer: Stroke the steel paperclip with the bar magnet in one direction many times.

Explanation: This process aligns the magnetic domains in the paperclip, making it a temporary magnet.
Marking: 1 mark for a correct method.

17. Answer: A temporary magnet can lose its magnetism easily, while a permanent magnet retains its magnetism for a long time.

Explanation: Temporary magnets are made from materials like steel that can be easily magnetized and demagnetized. Permanent magnets are made from materials like alnico or ferrite that are difficult to demagnetize.
Marking: 1 mark for a correct difference.

18. Answer: The student can bring the metal bar near some iron filings or a paperclip. If the bar attracts the iron filings or paperclip, it is a magnet. The student can also hang the bar freely and see if it points north-south.

Explanation: A magnet will attract magnetic materials. A freely suspended magnet will align with the Earth's magnetic field.
Marking: 1 mark for a correct method.

19. Answer: A magnet can attract a steel nail because steel is a magnetic material. A magnet cannot attract a copper coin because copper is a non-magnetic material.

Explanation: Only magnetic materials are attracted to magnets.
Marking: 1 mark for a correct explanation.

20. Answer: The magnetism of a magnet will be weakened or destroyed.

Explanation: Heating a magnet causes the magnetic domains to become misaligned, reducing or eliminating its magnetism.
Marking: 1 mark for a correct answer.