1. The Earth’s Atmosphere
Chapter 1

2. The Importance of Atmosphere
The atmosphere helps regulate earth’s temperature
It also protects the earth from harmful UV radiation

3. Composition
Nitrogen (78%) and oxygen (21%) are the main gases in the atmosphere.
The other 1% are…
Argon
Carbon Dioxide
Others…

4. Atmosphere Layers
The layers of the atmosphere are defined by temperature
Troposphere
Stratosphere
Mesosphere
Thermosphere
Exosphere

5. Troposphere It is where we are Contains 75% of the atmosphere’s gases
(nearly) All weather occurs here

6. Stratosphere
Contains the highest amount of ozone molecules (O3)

7. Mesosphere Have you seen a ‘shooting star’?
Not really a star, just something breaking up in the mesosphere

8. Thermosphere
The temperature is very, very high