Class 7 Science MCQs - Chapter 24

Sound Waves Quiz Answers PDF Download - 7

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Class 7 Science: Sound Waves Quiz Questions PDF Download

MCQ: Singing and talking are the

A) artificial sounds

B) natural sounds

C) man-made sounds

D) sounds made electronically

MCQ: In large empty rooms, even a click keeps on

A) increasing

B) decreasing

C) repeating

D) coming

MCQ: Sounds of thunder and horn of lorries are known as

A) loud sounds

B) soft sounds

C) high pitched sounds

D) low pitched sounds

MCQ: Sound is created by our vocal cord due to

A) air in lungs

B) cilia in the throat

C) vibration in throat

D) vibration in lungs

MCQ: The normal value of decibel that our ears can detect is

A) -20

B) 0

C) 20

D) 40

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