Here's a breakdown of the major layers:

1. Troposphere: This is the lowest layer where we live and where weather occurs.

2. Stratosphere: This layer contains the ozone layer, which protects us from harmful UV radiation.

3. Mesosphere: This layer is where most meteors burn up.

4. Thermosphere: This layer is very hot due to absorption of solar radiation.

5. Exosphere: The outermost layer where the atmosphere gradually fades into space.