Structure of the Atmosphere
The Earth's atmosphere is a complex layer of gases surrounding the planet, essential for life. It is divided into several layers, each with distinct characteristics.

1. Troposphere
- This is the lowest layer of the atmosphere, extending up to about 8-15 km above the Earth's surface.
- It contains approximately 75% of the atmosphere's mass and is where most weather phenomena occur.
- Temperature decreases with altitude in this layer.

2. Stratosphere
- Located above the troposphere, the stratosphere stretches from about 15 km to 50 km.
- It houses the ozone layer, which absorbs and scatters ultraviolet solar radiation.
- Temperature increases with altitude in this layer due to the absorption of radiation by ozone.

3. Mesosphere
- The mesosphere extends from 50 km to about 85 km above the Earth.
- It is where most meteors burn up upon entering the atmosphere.
- Temperature decreases with altitude, making it the coldest layer.

4. Thermosphere
- This layer ranges from 85 km to 600 km above the Earth.
- It is characterized by a dramatic increase in temperature, which can reach up to 2,500°C or more.
- The auroras occur in this layer, and it is where the International Space Station orbits.

5. Exosphere
- The outermost layer of the atmosphere, extending from about 600 km to 10,000 km.
- It is where atmospheric particles are so sparse that they can escape into space.
- Satellites orbit within this layer due to the minimal atmospheric drag.
Understanding the structure of the atmosphere is crucial for studying weather patterns, climate change, and the protection of life on Earth.