MEDIUM
8th CBSE
IMPORTANT
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How do sound waves travel in air medium? Explain.

Important Questions on Sound

MEDIUM
8th CBSE
IMPORTANT
Science Now 8>Chapter 12 - Sound>EXERCISE>Q 3
Write an experiment to demonstrate that sound needs a medium for its propagation.
MEDIUM
8th CBSE
IMPORTANT
Science Now 8>Chapter 12 - Sound>EXERCISE>Q 4
Describe an activity to show that sound travels through liquids.
HARD
8th CBSE
IMPORTANT
Science Now 8>Chapter 12 - Sound>EXERCISE>Q 5
What is noise pollution? What are the necessary measures to be taken to reduce it?
HARD
8th CBSE
IMPORTANT
Science Now 8>Chapter 12 - Sound>EXERCISE>Label the diagram of human ear given below
Label the structure of the human ear shown in the following picture. 
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HARD
8th CBSE
IMPORTANT
Science Now 8>Chapter 12 - Sound>EXERCISE>Q 1
Can you suggest one application of sound waves in oceanography?
HARD
8th CBSE
IMPORTANT
Science Now 8>Chapter 12 - Sound>EXERCISE>Q 2
Suppose two objects are colliding in space just above the Earth's atmosphere. Can we hear the sound produced due to the collision? Justify.
HARD
8th CBSE
IMPORTANT
Science Now 8>Chapter 12 - Sound>WORKSHEET>Solve the following crossword puzzle with the help of the clues given below

Solve the following crossword puzzle with the help of clues given below.

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Across

1. Speed greater than that of sound
2. Sound produced due to irregular variations in the amplitude is termed as _____.
7. Sounds of frequency above 20,000 Hz are called _____ sounds.
8. Shrillness of sounds is characterised by its _____.
9. Loudness of sounds is proportional to square of its _____.

Down

2. Phenomenon caused by reflection of sound
3. Pitch of a sound depends on its _____.
4. Unit of frequency
5. Sound is produced by. _____ of particles present in objects.