Sound [NSO Level 1- Science Olympiad (SOF) Class 8]: Questions 7 - 12 of 74

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Question 7

Question MCQ▾

The number of oscillations per second of a vibrating body to produce a sound audible to human ear should be

Choices

Choice (4)Response

a.

15 times

b.

25 times

c.

10 times

d.

20 times

Edit

Question 8

Question MCQ▾

Aquatic animals communicate through

Choices

Choice (4)Response

a.

Sound

b.

Gestures

c.

Movement

d.

Action

Edit

Question 9

Question MCQ▾

If the amplitude of a sound is , the loudness of the sound would be

Choices

Choice (4)Response

a.

1 dB

b.

2 dB

c.

6 dB

d.

9 dB

Edit

Question 10

Question MCQ▾

The relation between the loudness and amplitude of a sound is

Choices

Choice (4)Response

a.

Loudness is decreased by the twice of amplitude

b.

Loudness is increased by twice the amplitude

c.

Loudness is decreased by the square of amplitude

d.

Loudness is increased by the square of amplitude

Edit

Question 11

Question MCQ▾

Which of the following is not a use of sound?

Choices

Choice (4)Response

a.

Take photos of internal organs

b.

Treatment and entertainment

c.

Communication in animals

d.

Detect problems in internal organs in medical science

Edit

Question 12

Question MCQ▾

Presence of excessive or unwanted sound in the atmosphere causes

Choices

Choice (4)Response

a.

Air pollution

b.

Sound pollution

c.

Environment pollution

d.

Water pollution

Edit