MEDIUM
8th CBSE
IMPORTANT
Earn 100

What are echoes? Why do we not hear them all the time?

Important Questions on Sound

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 _____.
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.