Question

what is atmosphere ? define it layers​

Answer 1

$</p><p>\huge\star{\tt{\underline{\underline{\red{Answer}}}}}\star$The atmosphere is comprised of layers based on temperature.

These layers are the troposphere, stratosphere, mesosphere and thermosphere. A further region at about 500 km above the Earth's surface is called the exosphere.

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Answer 2

Answer:

The blanket of air surrounding the earth's surface is known as atmosphere.

It's layers are as follows :

1. Troposphere - The troposphere is the lowermost and densest layer. Its height varies from 18 in at Equator to 8 km at the poles.
2. Stratosphere - This layer lies above the tropopause. It extends to a height of 50 km from sea level.
3. Mesosphere - This layer lies above the stratosphere and extends to a height of 80 km from ground level.
4. Thermosphere - It extends from mesopause and consists of two layers (a) Ionosphere and (b) Exosphere.
5. Exosphere - It is the uppermost layer in the structure of the atmosphere. It lies between 400 to 1500 km above the earth.