CBSE Class 8 - Science Ch 13 - Sound (Worksheet)

Sound

Worksheet

Prolonged Use of Headphones and loud music can make you deaf

Write True or False for the senses given below. Also rewrite the false statements correctly:



1. Sound is a mechanical wave.

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2. Sound can travel through vacuum.

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3. Sound is produced by a vibrating body.

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4. The maximum displacement of a body from its mean position is called amplitude of oscillation.

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5. Loudness of a sound is measured in Hertz.

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6. Loudness of a sound depends on the frequency of the sound wave.

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7. Sound can travel through metals.

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8. In humans, sound is produced by larynx.

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9. Television and transistor radio at high volumes, some kitchen appliances, desert coolers, air conditioners, all contribute to noise pollution.

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10. Plantation on roadside can increase noise pollution.

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Answer:

1. True
2. False
3. True
4. True
5. False  (it is decibels dB)
6. False (depends on amplitude)
7. True
8. True
9. True
10. False (decrease)