There are 4 primary layers of the atmosphere on Earth: troposphere, stratosphere, mesosphere and thermosphere. The ionosphere and exosphere are above those.

Earth's atmosphere is split into four layers: troposphere, stratosphere, mesosphere, and thermosphere. These layers are separated because of how hot or cold they are. The lower layers are where weather happens, like rain and wind, while cool things like the pretty aurora occur in the higher layers.

The atmosphere of the Earth is divided into four layers: troposphere, Stratosphere, Mesosphere and Thermosphere, and they are separated based on temperature. Weather processes occur in the lower layers of the atmosphere while interesting events such as the beautiful aurora occur higher.