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Question (11)

QN003761

During Activity 4.1, a student predicted that a rubber eraser would stick to a magnet. On testing, it did not. The eraser is therefore:

(A) Magnetic
(B) Non-magnetic
(C) A magnet
(D) Metallic

Correct Answer: B

Explanation:

Since it is not attracted, it is non-magnetic.

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Question (12)

QN003762

Which of the following materials would most likely be placed in the “Yes” column of Table 4.1?

(A) Iron
(B) Glass
(C) Wood
(D) Plastic

Correct Answer: A

Explanation:

Iron is attracted by magnets.

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Question (13)

QN003763

A box contains objects made of iron, wood, rubber, and glass. A magnet is moved over the box. Which object will respond first?

(A) Glass marble
(B) Rubber band
(C) Iron key
(D) Wooden block

Correct Answer: C

Explanation:

Iron is a magnetic material.

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Question (14)

QN003764

Which observation proves that a material is magnetic?

(A) It floats on water
(B) It sticks to a magnet
(C) It is shiny
(D) It is hard

Correct Answer: B

Explanation:

Attraction towards a magnet identifies a magnetic material.

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Question (15)

QN003765

A student tested 8 objects. Five were attracted by a magnet and three were not. How many objects were made of magnetic materials?

(A) 3
(B) 5
(C) 8
(D) 13

Correct Answer: B

Explanation:

Objects attracted by a magnet are magnetic materials.

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Question (16)

QN003766

Which of the following combinations contains only non-magnetic materials?

(A) Iron and Nickel
(B) Cobalt and Iron
(C) Wood and Plastic
(D) Nickel and Plastic

Correct Answer: C

Explanation:

Both wood and plastic are non-magnetic.

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Question (17)

QN003767

A magnet is brought near four spoons made of iron, wood, plastic, and glass respectively. Which spoon will be attracted?

(A) Iron spoon
(B) Wooden spoon
(C) Plastic spoon
(D) Glass spoon

Correct Answer: A

Explanation:

Iron is attracted by magnets.

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Question (18)

QN003768

The term “magnetic material” refers to a material that:

(A) Is attracted towards a magnet
(B) Produces electricity
(C) Dissolves in water
(D) Floats on water

Correct Answer: A

Explanation:

This is the definition of a magnetic material.

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Question (19)

QN003769

A student collects 12 objects. If one-third of them are magnetic, how many objects are magnetic?

(A) 2
(B) 3
(C) 4
(D) 6

Correct Answer: C

Explanation:

12 ÷ 3 = 4.

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Question (20)

QN003770

Which of the following would not help in identifying a magnetic material?

(A) Bringing a magnet near it
(B) Observing attraction
(C) Testing whether it sticks to a magnet
(D) Checking its colour only

Correct Answer: D

Explanation:

Colour does not determine magnetism.

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Question (11)

During Activity 4.1, a student predicted that a rubber eraser would stick to a magnet. On testing, it did not. The eraser is therefore:

Explanation:

Link:

Question (12)

Which of the following materials would most likely be placed in the “Yes” column of Table 4.1?

Explanation:

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Question (13)

A box contains objects made of iron, wood, rubber, and glass. A magnet is moved over the box. Which object will respond first?

Explanation:

Link:

Question (14)

Which observation proves that a material is magnetic?

Explanation:

Link:

Question (15)

A student tested 8 objects. Five were attracted by a magnet and three were not. How many objects were made of magnetic materials?

Explanation:

Link:

Question (16)

Which of the following combinations contains only non-magnetic materials?

Explanation:

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Question (17)

A magnet is brought near four spoons made of iron, wood, plastic, and glass respectively. Which spoon will be attracted?

Explanation:

Link:

Question (18)

The term “magnetic material” refers to a material that:

Explanation:

Link:

Question (19)

A student collects 12 objects. If one-third of them are magnetic, how many objects are magnetic?

Explanation:

Link:

Question (20)

Which of the following would not help in identifying a magnetic material?

Explanation:

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