1.
Which of the following sounds is called noise?
2.
When an object vibrates, it forces the air particles around it to vibrate and thus _______ travel from one plane to another.
3.
Sound cannot pass through _______.
4.
The intensity of sound _______with the increase of distance from its source.
5.
Sound is a form of energy which produces _______ in matter particles.
6.
Sound travels _______ through solid objects than the air.
7.
The _______ who landed on the moon use wireless radio system for talking.
8.
A vibrating object produces _______.
9.
How does light travel in air?
10.
Speed of sound in air is _______ meter per second.
11.
We hear sound when it enters our ears after passing through _______.
12.
Which object does reflect maximum light?
13.
The louder the sound, the _______ is its intensity.
14.
The speed of sound in solid objects is almost _______ times greater than air.
15.
The sounds which are pleasant to our ears are called _______.
16.
Sound can travel through:
17.
Intensity of sound depends on its _______.
18.
The sounds which are unpleasant to our ears are called _______.
19.
Speed of sound is maximum in:.
20.
Sound cannot pass through space due to
21.
When water comes in the way of sound travelling through air:
22.
Buzzing of flies and mosquitoes is due to _______ of their wings.
23.
Speed of sound in iron is _______ meter per second.
24.
The speed of sound in water is almost _______ times greater than air.
25.
Speed of sound in water is _______ meter per second.
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