1. We have atmosphere because gravity pulls gas molecules “down”.

2. DIFFERENT DENSITIES!! WHY? That’s why there are TEMPERATURE ZONES.
Not all gas is pulled down the same way though.
WHY?
DIFFERENT DENSITIES!!

3. WEATHER occurs here.

4. Ozone layer here (blocks UV radiation).

5. Little air at all.

6. No more air. Outer space.

7. Ozone layer here (blocks UV radiation).
No more air. Outer space.
Little air at all.
Ozone layer here (blocks UV radiation).
WEATHER occurs here.

8. Less air ALSO means less pressure.

9. and less water vapor...
Any rain up here?

10. Which layer of the atmosphere experiences weather?
1) Thermosphere
2) Mesosphere
3) Stratosphere
4) Troposphere
All the gas and water vapor is there!