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Question (31)

QN003781

A toy contains parts made of iron and plastic. When a magnet is brought near it, only some parts move. This is because:

(A) Iron is magnetic and plastic is non-magnetic
(B) Plastic is magnetic and iron is non-magnetic
(C) Both are magnetic
(D) Both are non-magnetic

Correct Answer: A

Explanation:

Iron is attracted by magnets while plastic is not.

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Question (32)

QN003782

A student records the following observations: Iron nail–Yes, Wooden block–No, Steel pin–Yes, Glass piece–No. How many magnetic objects are present?

(A) 1
(B) 2
(C) 3
(D) 4

Correct Answer: B

Explanation:

Iron nail and steel pin are magnetic.

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Question (33)

QN003783

Which of the following conclusions can be drawn from Activity 4.1?

(A) Magnets attract all materials.
(B) Magnets attract only certain materials.
(C) Magnets attract only wood.
(D) Magnets attract only plastic.

Correct Answer: B

Explanation:

Only magnetic materials are attracted by magnets.

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Question (34)

QN003784

A bag contains 5 iron nails, 4 wooden sticks, 3 plastic caps, and 2 glass beads. How many items are expected to be attracted by a magnet?

(A) 2
(B) 5
(C) 7
(D) 14

Correct Answer: B

Explanation:

Only the 5 iron nails are magnetic.

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Question (35)

QN003785

Which of the following best fits the definition of a magnetic material?

(A) A material that is attracted towards a magnet
(B) A material that shines in sunlight
(C) A material that floats in water
(D) A material that bends easily

Correct Answer: A

Explanation:

This is the correct definition of a magnetic material.

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Question (36)

QN003786

A student separates magnetic objects from a mixed collection using a magnet. If 9 out of 18 objects are attracted, what fraction of the collection is magnetic?

(A) 1/4
(B) 1/3
(C) 1/2
(D) 3/4

Correct Answer: C

Explanation:

9/18 = 1/2.

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Question (37)

QN003787

Which example correctly represents a non-magnetic material used in Activity 4.1?

(A) Iron nail
(B) Nickel strip
(C) Wooden pencil
(D) Cobalt piece

Correct Answer: C

Explanation:

Wood is a non-magnetic material.

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Question (38)

QN003788

In a science fair activity, students use a magnet to sort objects. Which group will remain after all magnetic objects are removed?

(A) Iron and nickel objects
(B) Iron and cobalt objects
(C) Wood, glass, and plastic objects
(D) Iron, wood, and glass objects

Correct Answer: C

Explanation:

Wood, glass and plastic are non-magnetic.

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Question (39)

QN003789

A student observes that 12 out of 30 collected objects are attracted by a magnet. What percentage of the objects are non-magnetic?

(A) 30%
(B) 40%
(C) 50%
(D) 60%

Correct Answer: D

Explanation:

Magnetic = 12/30 = 40%, so non-magnetic = 60%.

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Question (40)

QN003790

A child claims that every object made of any material will stick to a magnet. Which observation disproves the claim?

(A) An iron nail sticks to a magnet.
(B) A steel pin sticks to a magnet.
(C) A wooden block does not stick to a magnet.
(D) A magnet attracts an iron clip.

Correct Answer: C

Explanation:

Wood is non-magnetic and is not attracted by a magnet.

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Question (31)

A toy contains parts made of iron and plastic. When a magnet is brought near it, only some parts move. This is because:

Explanation:

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Question (32)

A student records the following observations: Iron nail–Yes, Wooden block–No, Steel pin–Yes, Glass piece–No. How many magnetic objects are present?

Explanation:

Link:

Question (33)

Which of the following conclusions can be drawn from Activity 4.1?

Explanation:

Link:

Question (34)

A bag contains 5 iron nails, 4 wooden sticks, 3 plastic caps, and 2 glass beads. How many items are expected to be attracted by a magnet?

Explanation:

Link:

Question (35)

Which of the following best fits the definition of a magnetic material?

Explanation:

Link:

Question (36)

A student separates magnetic objects from a mixed collection using a magnet. If 9 out of 18 objects are attracted, what fraction of the collection is magnetic?

Explanation:

Link:

Question (37)

Which example correctly represents a non-magnetic material used in Activity 4.1?

Explanation:

Link:

Question (38)

In a science fair activity, students use a magnet to sort objects. Which group will remain after all magnetic objects are removed?

Explanation:

Link:

Question (39)

A student observes that 12 out of 30 collected objects are attracted by a magnet. What percentage of the objects are non-magnetic?

Explanation:

Link:

Question (40)

A child claims that every object made of any material will stick to a magnet. Which observation disproves the claim?

Explanation:

Link:

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