HARD
8th CBSE
IMPORTANT
Earn 100

Differentiate between audible and inaudible sounds.

Important Questions on Sound

MEDIUM
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 13 - Sound>Put on your thinking cap>Q 4
A vibrating object has a time period of 0.06 seconds. Will the sound be detected by the human ear? Give reasons to support your answer.
MEDIUM
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 13 - Sound>Put on your thinking cap>Q 4
What is timbre? How is it helpful?
MEDIUM
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 13 - Sound>Put on your thinking cap>Q 5
Explain how sound is produced in humans.
HARD
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 13 - Sound>Put on your thinking cap>Q 5
Describe an activity to show that sound can propagate through liquids.
MEDIUM
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 13 - Sound>Put on your thinking cap>Q 5
What are the sources of noise pollution? List some ways of controlling noise pollution.
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?