Primary 3 Science · Investigation worksheet

Properties of Magnets Investigation

Name:Date:Marks: / 20

Section A · Multiple choice 8 marks

1. Table 1 shows the results of testing four objects with a magnet. Which object is most likely made of steel?1 mark

Table 1

Object	Attracted to a magnet?
P	Yes
Q	No
R	No
S	No

(A) Q(B) P(C) R(D) S

2. Table 2 shows how many paper clips stuck to different places on a bar magnet. Where is the magnet weakest?1 mark

Table 2

Position on the bar magnet	A (left end)	B	C (centre)	D (right end)
Paper clips that stick	11	3	1	10

(A) C (centre)(B) A (left end)(C) B(D) D (right end)

3. Look at Table 2 again. Which two positions have the strongest pull?1 mark

Table 2

Position on the bar magnet	A (left end)	B	C (centre)	D (right end)
Paper clips that stick	11	3	1	10

(A) B and C(B) A and C(C) C and D(D) A and D

4. Two ring magnets are put on a pencil. The top ring floats above the bottom ring, as shown. What does this show?1 mark

(A) The two facing sides are unlike poles and they attract(B) The rings are made of plastic(C) The two facing sides are like poles and they repel(D) The bottom ring is not a magnet

5. A steel rod is attracted to both ends of a bar magnet. Can we say the rod is a magnet?1 mark

(A) Yes, because it is attracted(B) No, it may only be a magnetic material(C) Yes, because it is made of metal(D) No, because steel is not magnetic

6. Object X is attracted to the north pole of a magnet but repelled by the south pole. What is object X?1 mark

(A) A magnet(B) A piece of iron(C) A piece of plastic(D) A piece of wood

7. Ben turns a freely hanging bar magnet around and waits. Which direction does its south pole point to when it stops?1 mark

(A) North(B) East(C) West(D) South

8. Which of these is NOT a magnetic material?1 mark

(A) An iron nail(B) A steel paper clip(C) A copper wire(D) A steel screw

Section B · Show what you know 12 marks

9. Use Table 2. How many more paper clips stuck at A than at C?2 marks

Table 2

Position on the bar magnet	A (left end)	B	C (centre)	D (right end)
Paper clips that stick	11	3	1	10

10. Why must we test a mystery object with both poles of a magnet before we say it is a magnet?2 marks

11. The south pole of Magnet 1 attracts Magnet 2. Which pole of Magnet 2 is facing the south pole of Magnet 1? Give a reason.2 marks

12. Sam wants to find out which of two magnets is stronger by counting the paper clips each one picks up. Give one thing he must keep the same to make it a fair test.2 marks

13. Dev says, "An aluminium can is attracted to a magnet because it is made of metal." Is Dev correct? Explain.2 marks

14. Table 3 shows the results of three trials with a hanging bar magnet. What do you expect to see in Trial 4? Explain.2 marks

Table 3

Trial	Which way did the N pole point?
1	North
2	North
3	North

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