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Primary 3 Science Magnets Quiz

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Questions

P3 Science Quiz: Magnets (Properties, Uses & Poles)

Questions: 20 Time: 30 minutes Total Marks: 40

Section A: Multiple Choice (12 marks)

Choose the best answer and write 1, 2, 3 or 4 in the brackets. Each question carries 2 marks.

1. Which material will be attracted to a magnet? (2 marks)

Plastic spoon
Iron nail
Wooden stick
Glass cup

( )

2. What happens when the north pole of one magnet meets the north pole of another magnet? (2 marks)

They attract each other
They repel each other
Nothing happens
They stick together

( )

3. Every magnet has: (2 marks)

Only a north pole
Only a south pole
Both north and south poles
No poles

( )

4. Which of these objects uses a magnet? (2 marks)

Compass
Plastic ruler
Wooden pencil
Paper clip (by itself)

( )

5. A magnet can attract iron through: (2 marks)

Paper only
Water only
Paper, plastic, and glass
Nothing - it must touch

( )

6. Which metal is NOT attracted to magnets? (2 marks)

Iron
Aluminum
Steel
Nickel

( )

Section B: Short Answer (14 marks)

Answer the questions clearly. Each question carries 2 marks unless stated.

7. Complete these sentences about magnetic poles: (4 marks)

a) Like poles _____________ each other. (2 marks)

b) Unlike poles _____________ each other. (2 marks)

8. Name THREE objects in your house that contain magnets. (3 marks)

a) _________________________

b) _________________________

c) _________________________

9. Look at these materials. Sort them into two groups: (3 marks) [Iron nail, Plastic pen, Steel paperclip, Wooden ruler, Copper wire, Aluminum can]

Magnetic: _________________________

Non-magnetic: _________________________

10. Why can't you have a magnet with only one pole? (2 marks)

Answer: _________________________

11. Ahmad holds a magnet near a pile of paper clips. What will happen? Explain why. (2 marks)

Answer: _________________________

Section C: Investigation & Application (14 marks)

Use your knowledge about magnets to solve these problems.

12. Magnet Testing Investigation: (6 marks)

Mei Ling tests different objects with a magnet:

Object	Attracted?	Magnetic/Non-magnetic?
Iron nail	Yes	________________
Plastic bottle	________	Non-magnetic
Steel spoon	________	Magnetic
Glass marble	No	________________
Aluminum foil	________	________________

Complete the missing information. (6 marks - 1 mark each blank)

13. Magnet Pole Investigation: (4 marks)

Look at these magnets:

Magnet A:  [N] ←→ [S]    Magnet B:  [S] ←→ [N]

What will happen when you bring these magnets together?

a) N pole of Magnet A near S pole of Magnet B: ________________ (2 marks)

b) N pole of Magnet A near N pole of Magnet B: ________________ (2 marks)

14. Design Challenge: (4 marks)

Fatima wants to separate iron nails from a mixture of iron nails, plastic buttons, and wooden beads. How can she use a magnet to help? Describe the steps. (4 marks)

Step 1: _________________________

Step 2: _________________________

Step 3: _________________________

What happens: _________________________

Answer Key Summary:

Iron nail (ferrous material attracted to magnets)
They repel each other (like poles repel)
Both north and south poles (all magnets have two poles)
Compass (uses magnet to point north)
Paper, plastic, and glass (magnetism works through non-magnetic materials)
Aluminum (non-ferrous metal, not magnetic) 7a. Repel, 7b. Attract
Refrigerator door, speakers, can opener, magnetic toys, etc.
Magnetic: Iron nail, Steel paperclip; Non-magnetic: Plastic pen, Wooden ruler, Copper wire, Aluminum can
Magnets always have both poles; you cannot isolate one pole
Paper clips will be attracted and stick to magnet because they are made of steel/iron
Magnetic, No, Yes, Non-magnetic, No, Non-magnetic 13a. Attract (unlike poles), 13b. Repel (like poles)
Hold magnet near mixture, magnet attracts iron nails, lift magnet to remove nails, iron nails separated from non-magnetic materials

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Answers

P3 Science Quiz: Magnets (Properties, Uses & Poles) - ANSWERS

Questions: 20
Time: 30 minutes
Total Marks: 40

Section A: Multiple Choice (12 marks)

Each question carries 2 marks.

1. Which material will be attracted to a magnet? (2 marks)

Answer: 2 (Iron nail)

Explanation: Iron is a ferromagnetic material that is strongly attracted to magnets. Plastic, wood, and glass are non-magnetic materials.

2. What happens when the north pole of one magnet meets the north pole of another magnet? (2 marks)

Answer: 2 (They repel each other)

Explanation: Like magnetic poles (N-N or S-S) always repel each other. This is a fundamental property of magnetism.

3. Every magnet has: (2 marks)

Answer: 3 (Both north and south poles)

Explanation: All magnets must have both a north pole and a south pole. You cannot have a magnet with only one pole.

4. Which of these objects uses a magnet? (2 marks)

Answer: 1 (Compass)

Explanation: A compass contains a magnetic needle that aligns with Earth's magnetic field to point north.

5. A magnet can attract iron through: (2 marks)

Answer: 3 (Paper, plastic, and glass)

Explanation: Magnetic force can pass through non-magnetic materials like paper, plastic, and glass without being blocked.

6. Which metal is NOT attracted to magnets? (2 marks)

Answer: 2 (Aluminum)

Explanation: Aluminum is a non-ferrous metal and is not magnetic. Iron, steel (iron alloy), and nickel are all magnetic metals.

Section B: Short Answer (14 marks)

Each question carries 2 marks unless stated.

7. Complete these sentences about magnetic poles: (4 marks)

a) Like poles REPEL each other. (2 marks)

b) Unlike poles ATTRACT each other. (2 marks)

Explanation: This is the basic rule of magnetism - similar poles push apart, different poles pull together.

8. Name THREE objects in your house that contain magnets. (3 marks)

Possible answers (any 3):

a) Refrigerator door (1 mark)
b) Speakers/headphones (1 mark)
c) Can opener (1 mark)

Other acceptable answers: Magnetic toys, cabinet latches, credit card strips, computer hard drives, microwave door, electric motors in appliances.

9. Look at these materials. Sort them into two groups: (3 marks)

Magnetic: Iron nail, Steel paperclip (1.5 marks)

Non-magnetic: Plastic pen, Wooden ruler, Copper wire, Aluminum can (1.5 marks)

Explanation: Iron and steel (which contains iron) are magnetic. Plastic, wood, copper, and aluminum are not magnetic.

10. Why can't you have a magnet with only one pole? (2 marks)

Answer: Magnets always have both north and south poles / Magnetic poles always come in pairs / You cannot isolate a single magnetic pole

Explanation: This is a fundamental law of magnetism - magnetic monopoles do not exist in nature.

11. Ahmad holds a magnet near a pile of paper clips. What will happen? Explain why. (2 marks)

Answer: The paper clips will be attracted to the magnet and stick to it because paper clips are made of steel (contains iron), which is magnetic.

Section C: Investigation & Application (14 marks)

12. Magnet Testing Investigation: (6 marks)

Complete the missing information: (1 mark each blank)

Object	Attracted?	Magnetic/Non-magnetic?
Iron nail	Yes	Magnetic
Plastic bottle	No	Non-magnetic
Steel spoon	Yes	Magnetic
Glass marble	No	Non-magnetic
Aluminum foil	No	Non-magnetic

13. Magnet Pole Investigation: (4 marks)

a) N pole of Magnet A near S pole of Magnet B: They will attract each other (2 marks)

Explanation: Unlike poles (N and S) always attract.

b) N pole of Magnet A near N pole of Magnet B: They will repel each other (2 marks)

Explanation: Like poles (N and N) always repel.

14. Design Challenge: (4 marks)

How to separate iron nails from mixture:

Step 1: Hold/move the magnet near the mixture (1 mark)

Step 2: The iron nails will be attracted to the magnet (1 mark)

Step 3: Lift the magnet away to remove the nails (1 mark)

What happens: Only the iron nails stick to the magnet; plastic buttons and wooden beads are left behind because they are non-magnetic (1 mark)

TOTAL: 40 MARKS

Scoring Guide:

A: 32-40 marks (Excellent understanding of magnetism)
B: 24-31 marks (Good understanding with minor gaps)
C: 16-23 marks (Satisfactory, needs review of magnetic properties)
D: Below 16 marks (Requires additional support and practice)

Key Learning Points:

Magnetic Materials: Iron, steel, nickel, cobalt
Non-magnetic Materials: Plastic, wood, glass, aluminum, copper
Magnetic Poles: All magnets have N and S poles
Pole Rules: Like poles repel, unlike poles attract
Magnetic Force: Works through non-magnetic materials
Everyday Uses: Compasses, refrigerator doors, speakers, motors

~ End of Answer Key ~