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Question (21)

QN0013013

A student puts a tightly pressed aluminium foil ball in water. What will happen?

(A) It floats because foil is shiny
(B) It sinks because shape changed
(C) It dissolves
(D) It disappears

Correct Answer: B

Explanation:

The changed shape makes it sink.

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Question (22)

QN0013014

A student spreads the same aluminium foil into a flat shape. What is likely to happen?

(A) It floats
(B) It always sinks
(C) It melts
(D) It becomes heavier

Correct Answer: A

Explanation:

Flat foil can float because of its shape.

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Question (23)

QN0013015

Which activity helps children understand floating and sinking?

(A) Spinning coins
(B) Testing objects in water
(C) Colouring paper
(D) Making threads

Correct Answer: B

Explanation:

Testing objects in water demonstrates floating and sinking.

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Question (24)

QN0013016

The best way to know whether an object floats is to ______.

(A) Guess from its colour
(B) Test it in water
(C) Measure its length only
(D) Shake it

Correct Answer: B

Explanation:

Observation through experiment gives the correct result.

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Question (25)

QN0013017

A boat made using ice-cream sticks should be tested for its ability to ______.

(A) Spin fast
(B) Float and stay balanced
(C) Change colour
(D) Produce sound

Correct Answer: B

Explanation:

Boats are tested for floating and stability.

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Question (26)

QN0013018

A student says “iron always sinks because it is heavy.” The activity shows this statement is ______.

(A) Always correct
(B) Not always correct because shape matters
(C) Correct only for leaves
(D) Correct only for paper boats

Correct Answer: B

Explanation:

Shape and design also affect floating.

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Question (27)

QN0013019

Which pair contains one floating and one sinking object?

(A) Leaf and iron nail
(B) Marble and stone
(C) Spoon and coin
(D) Pin and marble

Correct Answer: A

Explanation:

Leaf floats and iron nail sinks.

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Question (28)

QN0013020

A paper boat floats better when it has ______.

(A) Proper shape
(B) No surface area
(C) Only extra weight
(D) Holes filled with water

Correct Answer: A

Explanation:

Good design improves floating.

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Question (29)

QN0013021

Which object from everyday life is designed using floating principles?

(A) Boat
(B) Pencil
(C) Eraser
(D) Book

Correct Answer: A

Explanation:

Boats are designed to float on water.

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Question (30)

QN0013022

The main learning from floating and sinking activities is that objects behave differently because of their ______.

(A) Properties and conditions
(B) Names
(C) Colours only
(D) Size only

Correct Answer: A

Explanation:

Different properties affect floating and sinking.

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Question (21)

A student puts a tightly pressed aluminium foil ball in water. What will happen?

Explanation:

Link:

Question (22)

A student spreads the same aluminium foil into a flat shape. What is likely to happen?

Explanation:

Link:

Question (23)

Which activity helps children understand floating and sinking?

Explanation:

Link:

Question (24)

The best way to know whether an object floats is to ______.

Explanation:

Link:

Question (25)

A boat made using ice-cream sticks should be tested for its ability to ______.

Explanation:

Link:

Question (26)

A student says “iron always sinks because it is heavy.” The activity shows this statement is ______.

Explanation:

Link:

Question (27)

Which pair contains one floating and one sinking object?

Explanation:

Link:

Question (28)

A paper boat floats better when it has ______.

Explanation:

Link:

Question (29)

Which object from everyday life is designed using floating principles?

Explanation:

Link:

Question (30)

The main learning from floating and sinking activities is that objects behave differently because of their ______.

Explanation:

Link:

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