Question

Q. Write short note on Atmosphere . Ans. The earth is surrounded by a layer of gas called the
atmosphere. This thin blanket of air is an integral
and important aspect of the planet. It provides us with
the air we breathe and protects us from the harmful
effects of sun’s rays.

lThe atmosphere extends up to a height of about

1,600 kilometres. The atmosphere is divided into five
layers based on composition, temperature and other
properties. These layers starting from earth’s surface
are called the troposphere, the stratosphere, the
mesosphere, the thermosphere and the exosphere.
The atmosphere is composed mainly of nitrogen and
oxygen, which make up about 99 per cent of clean,
dry air. Nitrogen 78 per cent, oxygen 21 per cent and
other gases like carbondioxide, argon and others
comprise 1 per cent by volume.​

Answer 1

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