Across
- 3. direct contact with an object
- 5. very spread out particles
- 8. where weather occurs
- 9. the planet we live on
Down
- 1. blocks out harmful rays
- 2. the center of our solar system
- 4. average energy of a system
- 6. 21% of Earths air
- 7. occurs in the Thermosphere
- 10. total energy of the system