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Question (1)

QN0029133

Why does a wooden block generally float on water?

(A) It is heavier than water
(B) Its density is less than that of water
(C) It absorbs water quickly
(D) It contains no mass

Correct Answer: B

Explanation:

A wooden block floats because its density is less than that of water.

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Question (2)

QN0029134

An object will float in water if its density is:

(A) greater than the density of water
(B) equal to zero
(C) less than the density of water
(D) greater than its mass

Correct Answer: C

Explanation:

Objects with density less than water float.

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Question (3)

QN0029135

An iron nail sinks in water mainly because:

(A) it is small
(B) it is shiny
(C) its density is greater than that of water
(D) it has a pointed end

Correct Answer: C

Explanation:

Iron is denser than water, so it sinks.

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Question (4)

QN0029136

Density is defined as:

(A) mass × volume
(B) volume ÷ mass
(C) mass per unit volume
(D) mass + volume

Correct Answer: C

Explanation:

Density = Mass ÷ Volume.

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Question (5)

QN0029137

Which of the following is most likely to float on water?

(A) Stone
(B) Iron rod
(C) Cork
(D) Copper coin

Correct Answer: C

Explanation:

Cork has lower density than water.

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Question (6)

QN0029138

A block has a mass of 200 g and a volume of 250 cm³. Its density is:

(A) 0.5 g/cm³
(B) 0.8 g/cm³
(C) 1.2 g/cm³
(D) 2.0 g/cm³

Correct Answer: B

Explanation:

Density = 200 ÷ 250 = 0.8 g/cm³.

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Question (7)

QN0029139

Water has a density of approximately:

(A) 0.1 g/cm³
(B) 0.5 g/cm³
(C) 1.0 g/cm³
(D) 10 g/cm³

Correct Answer: C

Explanation:

The density of water is approximately 1.0 g/cm³.

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Question (8)

QN0029140

An object with density 1.2 g/cm³ placed in water will:

(A) float completely
(B) sink
(C) remain above water
(D) evaporate

Correct Answer: B

Explanation:

Objects denser than water sink.

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Question (9)

QN0029141

A material has mass 90 g and volume 60 cm³. Its density is:

(A) 0.67 g/cm³
(B) 1.0 g/cm³
(C) 1.5 g/cm³
(D) 2.0 g/cm³

Correct Answer: C

Explanation:

Density = 90 ÷ 60 = 1.5 g/cm³.

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Question (10)

QN0029142

Which statement correctly explains floating?

(A) All heavy objects sink
(B) Objects with density less than water float
(C) Small objects always float
(D) Large objects always sink

Correct Answer: B

Explanation:

Floating depends mainly on density.

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Question (1)

Why does a wooden block generally float on water?

Explanation:

Link:

Question (2)

An object will float in water if its density is:

Explanation:

Link:

Question (3)

An iron nail sinks in water mainly because:

Explanation:

Link:

Question (4)

Density is defined as:

Explanation:

Link:

Question (5)

Which of the following is most likely to float on water?

Explanation:

Link:

Question (6)

A block has a mass of 200 g and a volume of 250 cm³. Its density is:

Explanation:

Link:

Question (7)

Water has a density of approximately:

Explanation:

Link:

Question (8)

An object with density 1.2 g/cm³ placed in water will:

Explanation:

Link:

Question (9)

A material has mass 90 g and volume 60 cm³. Its density is:

Explanation:

Link:

Question (10)

Which statement correctly explains floating?

Explanation:

Link:

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