EASY
8th CBSE
IMPORTANT
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Instruments such as sitar and violin produce sounds when their (membranes/strings) are vibrated.

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Important Questions on Sound

EASY
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 13 - Sound>Put on your thinking cap>Q 2
The voice box is present at the _____ end of the windpipe.
EASY
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 13 - Sound>Put on your thinking cap>Q 2
The _____ is a stretched membrane in ear, that vibrates on receiving sound vibrations.
EASY
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 13 - Sound>Put on your thinking cap>Q 2
The loudness of sound is expressed in _____.
MEDIUM
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 13 - Sound>Put on your thinking cap>Q 2
Dolphins can hear sounds up to the frequency of _____ Hz.

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EASY
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 13 - Sound>Put on your thinking cap>Q 3
Sound can propagate through gases and liquids but not solids.
EASY
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 13 - Sound>Put on your thinking cap>Q 3
Three vocal cords are stretched across the voice box.
MEDIUM
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 13 - Sound>Put on your thinking cap>Q 3
The loudness of sound is proportional to the square of the amplitude of vibration producing the sound.
MEDIUM
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 13 - Sound>Put on your thinking cap>Q 3
Sounds with frequencies greater than 20,000 Hz are known as ultrasounds.