HARD
8th CBSE
IMPORTANT
Earn 100

Explain the working of human ear with the help of a flow chart. 

Important Questions on Sound

MEDIUM
8th CBSE
IMPORTANT
LEARNING SCIENCE>Chapter 13 - Sound>Exercise>Q 3
What is noise pollution? 
MEDIUM
8th CBSE
IMPORTANT
LEARNING SCIENCE>Chapter 13 - Sound>Exercise>Q 3
 Name any three sources of noise pollution. 
HARD
8th CBSE
IMPORTANT
LEARNING SCIENCE>Chapter 13 - Sound>Exercise>Q 3
Write any five measures to reduce noise pollution. 
MEDIUM
8th CBSE
IMPORTANT
LEARNING SCIENCE>Chapter 13 - Sound>Exercise>Q 1
Can you hear sound in space? Give reason.
MEDIUM
8th CBSE
IMPORTANT
LEARNING SCIENCE>Chapter 13 - Sound>Exercise>Q 2
A ringing alarm clock is placed in vacuum. Why will you not be able to hear its ticking sound? 
MEDIUM
8th CBSE
IMPORTANT
LEARNING SCIENCE>Chapter 13 - Sound>Exercise>Q 3
If you want to hear a train approaching from far away, why is it more convenient to put the ear to the track?
HARD
8th CBSE
IMPORTANT
LEARNING SCIENCE>Chapter 13 - Sound>Exercise>Q 4

By how much will the loudness of a sound change when the amplitude of vibrations is

(a) tripled 

(b) doubled?
HARD
8th CBSE
IMPORTANT
LEARNING SCIENCE>Chapter 13 - Sound>Exercise>Q 5
When you listen to the sound produced by a tuning fork and the sound of the same frequency produced by a sitar, you find that tuning fork sounds flat whereas the sitar sounds shrill. Why?