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