What is the basis for the division of Earth’s atmosphere?

The division of Earth's atmosphere is based on the variation in temperature. Here are the steps explaining the basis:

1. Troposphere: This is the lowest layer of the atmosphere where we live. It extends up to about 8 kilometers at the poles and about 18 kilometers at the equator. The temperature in this layer decreases with altitude. Most of the Earth's weather occurs in the troposphere.

2. Stratosphere: Above the troposphere is the stratosphere, which extends up to about 50 kilometers. Unlike the troposphere, the temperature in this layer increases with altitude. This is due to the absorption of ultraviolet radiation from the Sun by the ozone layer, which is located in this layer.

3. Mesosphere: Above the stratosphere is the mesosphere, which extends up to about 85 kilometers. The temperature in this layer decreases with altitude. This is the layer where most meteors burn up upon entering the Earth's atmosphere.

4. Thermosphere: Above the mesosphere is the thermosphere, which extends up to about 600 kilometers. The temperature in this layer increases with altitude due to the absorption of highly energetic solar radiation.

5. Exosphere: This is the outermost layer of the Earth's atmosphere, extending from the top of the thermosphere up to about 10,000 kilometers. The temperature in this layer varies greatly, and it is often considered to be a part of outer space.

In summary, the division of Earth's atmosphere is based on the changes in temperature with altitude. Each layer has a different temperature gradient, leading to different characteristics and phenomena.