EARTH

2. Boundary for the exosphere
4. Absorbs most of the sun's ultra violet radiation
7. What is a major obstacle in the troposphere?
9. closest to the earth contains the air humans breath
12. the air is especially thin meteors burn up here
13. Marks the altitude where a traditional aircraft can no longer effectively fly
15. These are colorless, tasteless, formless, and they blend together so well
16. here temperature from the sun effects this layer

1. Where the Ozone layer is
3. In the stratosphere what is a major obstacle?
5. Made the comparison between the “world's biggest memory” in 1973
6. This happens when high energy particles collide with the sun
8. the body or air the surrounding earth/envelope of gasses held around the earth filters what comes in and out of earth
10. this has very few molecules that can escape into space
11. when is the troposphere thinnest?
14. blank and oxygen is 99% of earth, what is blank?