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Primary 5 Science Magnets Quiz
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Questions
TuitionGoWhere Primary School (AI)
Primary 5 Science - Magnets
Quiz 01 | Pre-PSLE Preparation
Name: _________________________ Date: _____________ Score: ___ / 50
Section A: Multiple Choice Questions (2 marks each)
1. Which of the following materials can be attracted by a magnet?
- A) Aluminium can
- B) Copper coin
- C) Steel paper clip
- D) Brass key
2. What happens when the north pole of one magnet is brought near the south pole of another magnet?
- A) They repel each other
- B) They attract each other
- C) Nothing happens
- D) They lose their magnetism
3. A bar magnet is suspended freely by a string. Which direction will the north pole of the magnet point to?
- A) Geographic South
- B) Geographic North
- C) Geographic East
- D) Geographic West
4. Which part of a bar magnet has the strongest magnetic force?
- A) The middle
- B) The poles
- C) All parts have equal strength
- D) The part closest to iron
5. Which of the following can destroy the magnetism of a magnet?
- A) Keeping it in a cool place
- B) Storing it with a keeper
- C) Dropping it repeatedly on a hard surface
- D) Keeping it away from other magnets
Section B: Fill in the Blanks (2 marks each)
6. Materials that are attracted by magnets are called _____________ materials.
7. Like poles _____________ and unlike poles _____________.
8. A _____________ is used to show directions and works because Earth behaves like a giant magnet.
9. The region around a magnet where magnetic force can be felt is called the _____________ _____________.
10. Iron can be made into a _____________ magnet by stroking it repeatedly with a magnet in one direction.
Section C: Short Answer Questions (4 marks each)
11. A student tested different objects with a magnet and recorded the results:
| Object | Attracted to magnet |
|---|---|
| Iron nail | Yes |
| Aluminium foil | No |
| Steel spoon | Yes |
| Plastic ruler | No |
| Copper wire | No |
(a) What do the iron nail and steel spoon have in common that makes them attracted to the magnet?
(b) Explain why the copper wire is not attracted to the magnet even though it is a metal.
12. Look at the diagram below:
[N]----[S] [S]----[N]
Magnet A Magnet B
←--→
(a) What will happen when Magnet A and Magnet B are released?
(b) If we turn Magnet B around so that both north poles face each other, what will happen?
13. Describe how you would use a bar magnet to make a temporary magnet from an iron nail. Why is it called a "temporary" magnet?
Section D: Structured Questions (5 marks each)
14. A student wants to find out which of three bar magnets (A, B, C) is the strongest. She uses each magnet to pick up paper clips.
| Magnet | Number of paper clips picked up |
|---|---|
| A | 8 |
| B | 15 |
| C | 5 |
(a) Which magnet is the strongest? How do you know? (2 marks)
(b) State TWO variables that should be kept constant in this experiment to make it a fair test. (2 marks)
(c) Suggest another method to compare the strength of magnets. (1 mark)
15. Study the diagram of a magnetic field below:
_______________
| |
N --| |-- S
|_______________|
Lines curve from N pole to S pole outside the magnet
(a) In which direction do magnetic field lines travel outside the magnet? (1 mark)
(b) Where is the magnetic field the strongest? How can you tell from the field lines? (2 marks)
(c) What would happen to iron filings if they were sprinkled around this magnet? (2 marks)
Section E: Higher-Order Thinking (5 marks)
16. Read the scenario below:
A technician needs to separate a mixture of iron filings and sand. He has a bar magnet, paper, and water available.
(a) Describe how the technician can use the magnet to separate the mixture. (2 marks)
(b) Why should the magnet be wrapped in paper before putting it in the mixture? (1 mark)
(c) Could this method be used to separate aluminium filings from sand? Explain your answer. (2 marks)
End of Quiz
Answers
TuitionGoWhere Primary School (AI)
Primary 5 Science - Magnets
Quiz 01 | Answer Key
Section A: Multiple Choice Questions (2 marks each)
1. C) Steel paper clip
Steel contains iron and is magnetic; aluminium, copper, and brass are non-magnetic metals
2. B) They attract each other
Unlike/opposite poles attract each other
3. B) Geographic North
The north pole of a magnet points towards Earth's magnetic north (geographic north)
4. B) The poles
Magnetic force is strongest at the poles of a magnet
5. C) Dropping it repeatedly on a hard surface
Hitting or dropping a magnet disturbs the alignment of magnetic domains, weakening or destroying magnetism
Section B: Fill in the Blanks (2 marks each)
6. magnetic
Materials attracted by magnets are called magnetic materials
7. repel ; attract
Like poles repel; unlike poles attract
8. compass
A compass needle is a small magnet that aligns with Earth's magnetic field
9. magnetic field
The magnetic field is the area around a magnet where magnetic force acts
10. temporary (or induced)
Stroking iron with a magnet temporarily magnetises it
Section C: Short Answer Questions (4 marks each)
11. (a) Both the iron nail and steel spoon contain iron, which is a magnetic material. Steel is an alloy made mainly of iron. (2 marks)
(b) Although copper is a metal, it is not a magnetic material. Only iron, steel, nickel, and cobalt are attracted to magnets. Being a metal does not automatically make something magnetic. (2 marks)
12. (a) The magnets will attract each other and move towards each other because unlike poles (S and S facing... wait, let me re-read: Magnet A has S facing Magnet B which has S facing back).
Actually from the diagram: Magnet A's S pole faces Magnet B's S pole. They will repel each other and move apart because like poles (S-S) repel. (2 marks)
(b) If both north poles face each other, the magnets will repel each other because like poles repel. (2 marks)
13. To make a temporary magnet:
- Place the iron nail on a flat surface
- Stroke the iron nail with one pole of the bar magnet repeatedly in the same direction (about 30-50 times)
- Lift the magnet away from the nail at the end of each stroke before bringing it back to the starting point
- The nail will become magnetised
It is called a "temporary" magnet because it will gradually lose its magnetism over time, especially when dropped or heated. The magnetic domains in iron do not stay aligned permanently. (4 marks)
Section D: Structured Questions (5 marks each)
14. (a) Magnet B is the strongest because it picked up the most paper clips (15). The stronger the magnet, the more magnetic material it can attract and hold. (2 marks)
(b) Variables to keep constant:
- Use the same type and size of paper clips
- Start from the same distance/position
- Use the same part of the magnet (e.g., the pole)
- Same environmental conditions (no interference from other magnets) (1 mark each, any 2 correct)
(c) Other methods to compare magnet strength:
- Measure the distance at which each magnet can attract a paper clip
- Measure the force needed to pull a paper clip away from each magnet
- See which magnet can attract through more sheets of paper (1 mark for any valid method)
15. (a) Magnetic field lines travel from the north pole to the south pole outside the magnet. (1 mark)
(b) The magnetic field is strongest at the poles. This can be seen from the field lines because the field lines are closest together (most concentrated) at the poles. Where lines are closer together, the field is stronger. (2 marks)
(c) The iron filings would:
- Be attracted to the magnet and arrange themselves along the magnetic field lines
- Cluster most densely at the poles where the magnetic field is strongest
- Form a pattern showing the shape of the magnetic field (2 marks)
Section E: Higher-Order Thinking (5 marks)
16. (a) Procedure to separate iron filings from sand:
- Wrap the bar magnet in paper
- Move the wrapped magnet through the mixture (or hover it close to the mixture)
- The iron filings will be attracted to the magnet and stick to the paper
- Pull the magnet away from the mixture and remove the paper to collect the iron filings separately
- Repeat until all iron filings are removed (2 marks)
(b) The paper makes it easier to remove the iron filings from the magnet. Without paper, the iron filings would stick directly to the magnet and be difficult to remove. With paper, you simply remove the magnet from inside the paper and the filings fall off. (1 mark)
(c) No, this method cannot be used to separate aluminium filings from sand because aluminium is not a magnetic material. Aluminium is not attracted to magnets, so the magnet would not be able to pick up the aluminium filings from the sand. (2 marks)
Marking Scheme
| Section | Questions | Total Marks |
|---|---|---|
| A | 1-5 | 10 |
| B | 6-10 | 10 |
| C | 11-13 | 12 |
| D | 14-15 | 10 |
| E | 16 | 5 |
| Total | 47 |
End of Answer Key