The region of the atmosphere from 50 to 300 miles above sea level is called the thermosphere.

Here's a breakdown of the Earth's atmospheric layers:

* Troposphere: 0 to 7 miles (11 km) – where we live, weather occurs

* Stratosphere: 7 to 31 miles (11 to 50 km) – contains the ozone layer

* Mesosphere: 31 to 53 miles (50 to 85 km) – where most meteors burn up

* Thermosphere: 53 to 370 miles (85 to 600 km) – very thin air, high temperatures due to solar radiation

* Exosphere: 370 miles (600 km) and beyond – where the atmosphere gradually fades into space

Let me know if you have any other questions about the atmosphere!