1. Troposphere
* Height: 0 to 6-20 km (4-12 miles) (varies by latitude)
* Key Features:
* Contains most of the atmosphere's mass (75% - 80%) and almost all of its water vapor
* Where weather occurs
* Temperature decreases with altitude
2. Stratosphere
* Height: 6-20 km (4-12 miles) to 50 km (31 miles)
* Key Features:
* Contains the ozone layer, which absorbs most of the Sun's harmful ultraviolet (UV) radiation
* Temperature increases with altitude due to absorption of UV radiation
3. Mesosphere
* Height: 50 km (31 miles) to 80-85 km (50-53 miles)
* Key Features:
* Coldest layer of the atmosphere
* Meteors burn up in this layer
4. Thermosphere
* Height: 80-85 km (50-53 miles) to 600-1000 km (373-621 miles)
* Key Features:
* Very thin air, but high temperatures due to absorption of solar radiation
* Where the International Space Station orbits
* Auroras occur here
5. Exosphere
* Height: 600-1000 km (373-621 miles) to 10,000 km (6,214 miles) and beyond
* Key Features:
* Outermost layer, gradually fading into space
* Satellites and spacecraft operate here
* No defined upper boundary, as it gradually blends into the vacuum of space
Note: The height boundaries between layers are not always perfectly defined and can vary depending on latitude and other factors.
