HARD
8th CBSE
IMPORTANT
Earn 100

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

Important Questions on Sound

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 _____.
EASY
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 9 - Sound>Exercises>Q D
The maximum displacement of a vibrating body from its position of rest is its _____.
EASY
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 9 - Sound>Exercises>Q D
The frequency of ultrasonic is _____ than the range of human hearing. Choose from the bracket (greater, lower).
MEDIUM
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 9 - Sound>Exercises>Q D
Sound vibrations die out after travelling some distance due to the loss of _____.(Energy/Force)
EASY
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 9 - Sound>Exercises>Q D
Sound needs a _____to travel.
EASY
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 9 - Sound>Exercises>Q D
Industrial noise can be reduced by proper _____ (maintenance/cooling).
MEDIUM
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 9 - Sound>Exercises>Q D

The reflecting surface has to be at least _____ metres away for us to hear an echo distinctly. 

Choose from the following: 10.4, 17.2, 22.2