MEDIUM
8th CBSE
IMPORTANT
Earn 100

What is the basic difference between music and noise? What are regular vibrations?

Important Questions on Sound

MEDIUM
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 9 - Sound>Exercises>Q B
What determines the harmfulness of noise from the point of view of health? Mention two sources of noise pollution.
MEDIUM
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 9 - Sound>Exercises>Q B
Why do we see a flash of lightning before we hear the accompanying sound of thunder? Which characteristic of sound determines how far it can travel before dying out?
EASY
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 9 - Sound>Exercises>Q B
Name the organ which helps us speak. How are sounds produced by it?
MEDIUM
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 9 - Sound>Exercises>Q B
What are echoes? Why do we not hear them all the time?
MEDIUM
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 9 - Sound>Exercises>Q B
How are echoes used in medicine?
HARD
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 9 - Sound>Exercises>Q C

Explain how sound travels through air. Why does sound travel faster through solids than through air?

HARD
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 9 - Sound>Exercises>Q C

Explain how we hear.

EASY
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 9 - Sound>Exercises>Q D
The frequency of sound is measured in _____.