Sound (Pratice Sheet, Class 8)

(1) What are the maximum and minimum limits of human’s ear to hear?

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(2)What are the differences between the loudness and pitch of the sound?

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(3)What is sound?

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(4) Show how can sound travel in water?

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(5) An object oscillates 50 times in 10 seconds. Find the frequency of the object.

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(6) Match the items in column A with the items column B

        Column A                                      Column B

(1) Frequency                                  hearing impairment

(2) 10,000Hz                                    inaudible sounds

(3) Sound cannot travel                 Hz

(4)10Hz                                            audible sound

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(7) Select the given items under “Low frequency” and High frequency”.

Voice of woman, voice of guitar, voice of lion, voice of crackers, voice of cow and voice of iron sheet

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(8) Which part of our body vibrates when we speak?

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(9) How dolphins communicate under water?

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(10) What are the differences between audible and inaudible sounds?

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Helping Topics

Sound

NCERT solutions, class 8

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