Section 1 Atmosphere

1. atmosphere: refers to the air layer around the earth at a height of about 1000 km above the earth.

2, the importance of the atmosphere: if there is no atmosphere, Earth A, there will be no weather change; B, no sound; ; C, vulnerable to meteorite attacks; D, the temperature difference is very large.

3. Stratification of atmosphere: According to the vertical distribution characteristics of atmospheric temperature, atmospheric density and material composition, the atmosphere can be divided into five layers-

Troposphere, stratosphere, mesosphere, warm layer and outer layer.

4. Troposphere: the bottom layer of the atmosphere, which is most closely related to human life and production.