Q1 of 34 Page 227

Explain how does a sound making object differ from one that is silent.

A sound making object is a vibrating object for which it can produce sound while a silent body is a non vibrating object.


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3

We should plant trees along roadside. Explain why.

 4

Explain in brief about hearing impairment.

 2

Mention the reason that brings the sound of fire crackers to our ears.

 3

Mention the name of passage in the outer ear which carries sound waves to the eardrum.