The Atmosphere
- The Earth's atmosphere is a thin layer (relative to the size of the Earth) of air around it
- It exerts a pressure of about 100 kPa at sea level
The Earth's atmosphere
- The atmosphere extends more than 100 km into space and becomes less dense with increasing altitude (height above sea level)
- This means that the pressure becomes less too
- Atmospheric pressure various slightly from day to day, depending on the weather, and fine clear weather is usually associated with high pressure