Galaxy A Course in Science Book 8>Chapter 13 - Sound>Put on your thinking cap>Q 5

MEDIUM

8th CBSE

IMPORTANT

Earn 100

What are the sources of noise pollution? List some ways of controlling noise pollution.

Important Questions on Sound

HARD

8th CBSE

IMPORTANT

Galaxy A Course in Science Book 8>Chapter 13 - Sound>Put on your thinking cap>Q 5

What is hearing impairment? How can people with condition communicate?

HARD

8th CBSE

IMPORTANT

Galaxy A Course in Science Book 8>Chapter 13 - Sound>Put on your thinking cap>Q 6

Look at the given picture and answer the following.

(i) Identify musical instrument shown in the figure.

(ii) How does it produce sound?

(iii) How does sound produced by an instrument reach ears.
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MEDIUM

8th CBSE

IMPORTANT

Galaxy A Course in Science Book 8>Chapter 13 - Sound>HOTS>Q 1

People on the surface of the moon use radio sets to communicate. Why?

HARD

8th CBSE

IMPORTANT

Galaxy A Course in Science Book 8>Chapter 13 - Sound>HOTS>Q 2

Why a person is unable to speak when a larynx is pressed hard?

MEDIUM

8th CBSE

IMPORTANT

Galaxy A Course in Science Book 8>Chapter 13 - Sound>AT A GLANCE>Q 1

Complete the mind map given below.