1
Liquids keep their shape as the particles do not change position.
2
Oxygen gas makes up 4/5 of the air.
3
Melting occurs when a solid is heated and it changes into a gas.
4
Bicarbonate of soda is an example of a liquid.
5
The flying aeroplane is not a source of sound
6
Sound travels fastest in gas.
7
Sound can not be heard in space.
8
Sound travels from the ears to the source.
9
Sound travels best through water than wood.
10
A medium is the substance through which a wave can travel.
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