1. 4 Layers of the atmosphere They are the troposphere, stratosphere mesosphere and thermosphere.

2. Troposphere Layer 1 Atmospheric layer that we live in Short-term weather Long-term climate It’s elevation ranges from 0 to 17 km

3. Composition of Air There are many different types of gases in the atmosphere They include nitrogen, oxygen, argon, carbon dioxide and other noble gasses Nitrogen is the most abundant - 78%

4. Stratosphere Layer 2 This layer contains the ozone layer, which protects us from harmful UV radiation 17 km to 48 km

5. Mesosphere Layer 3 Meteors burn up when reentering the atmosphere It’s elevation ranges from 48 to 100 km

6. Thermosphere Layer 4 Highest layer of the atmosphere Northern Lights occur here (aurora borealis) Temperature in 1000’s of degrees It’s height ranges from 100 to 400 km