1) what two layers of the atmosphere protect us?

2)what does the air in the troposphere do as it heats up from the sun?

3)what is the temperature change in the troposphere with the temperature change in the stratosphere?

4)where is the ozone layer and why is it important?

5)why do pilots usually fly in the atmosphere?

6)what attaches it self to this jet stream and, in a sense, tells you where the stratosphere begins?