Sound (CBSE Class-8 Science): Questions 17 - 24 of 24

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Question number: 17

» Sound » Sound Needs a Medium for Propagation » Vacuum and Loudness

MCQ▾

Question

Intensity of sound is called as:

Choices

Choice (4) Response

a.

Oscillation

b.

Shrillness

c.

Loudness

d.

Amplitude

Question number: 18

» Sound » Amplitude, Time Period & Frequency of Vibration » Amplitude and Frequency of Vibration

MCQ▾

Question

The maximum vibration of an object is called:

Choices

Choice (4) Response

a.

Pitch

b.

Vibration

c.

Oscillation

d.

Amplitude

Question number: 19

» Sound » Property of Sound » Noise Pollution

MCQ▾

Question

Noise pollution is defined as:

Choices

Choice (4) Response

a.

Presence of excessive or unwanted sound in the atmosphere

b.

Pleasant sounds

c.

Unpleasant sounds

d.

None of the above

Question number: 20

» Sound » Human Ear » Loudness and Pitch

MCQ▾

Question

Frequency perceived by a listener is called as:

Choices

Choice (4) Response

a.

Pitch

b.

Loudness

c.

None of the above

d.

Question does not provide sufficient data or is vague

Question number: 21

» Sound » Sound Needs a Medium for Propagation » Sound Travelling Through Solids and Liquids

MCQ▾

Question

Sound can travel through

Choices

Choice (4) Response

a.

Liquids

b.

Solid

c.

Gases

d.

All a. , b. and c. are correct

Question number: 22

» Sound » Property of Sound » Noise Pollution

MCQ▾

Question

Ways of reducing unwanted noise pollution are:

Choices

Choice (4) Response

a.

Vehicle exhaust systems are fitted with silencers

b.

Use of sound insulating materials

c.

Designing quieter engines

d.

All a. , b. and c. are correct

Question number: 23

» Sound » Property of Sound » Noise and Music

MCQ▾

Question

Musical sounds are:

Choices

Choice (4) Response

a.

Pleasant sounds

b.

Unpleasant sounds

c.

Unwanted sounds

d.

Excessive sounds

Question number: 24

» Sound » Sound Produced by Humans » Structure of Voice Box

MCQ▾

Question

High pitched sound is called as:

Choices

Choice (4) Response

a.

Bass sound

b.

Oscillation

c.

Noise

d.

Shrill sound

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