Question

define atmosphere name the four layers of atmosphere​

Answer 1

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Atmosphere

The atmosphere is a colourless, tasteless , odourless blanket of gases yah surrounds the Earth.

Layers of Atmosphere

• Troposphere - It extends about 12km above the ground and is the only layer in which living things can survive naturally.
• Stratosphere - It contains 19% of atmosphere gases,but little water vapour.
• Mesosphere - In the mesosphere, temperature decreases as altitude increases. 
• Thermosphere - It is very important for human life as it contributes enormously to protecting the earth, as well as enabling space exploration and modern forms of communication.

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Answer 2

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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.