Atmosphere

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Across
  1. 3. also called the Northern lights
  2. 4. most of this is reflected back into space
  3. 7. protects from meteors
  4. 10. Most prominent gas in our atmosphere
  5. 12. contains the ozone layer
  6. 14. the gas we breathe
  7. 15. farthest layer of the atmosphere
Down
  1. 1. Marks the altitude where traditional aircraft can't fly
  2. 2. filters out UV rays
  3. 5. hottest layer of the atmosphere
  4. 6. this is also called the troposphere
  5. 8. gives off radiation
  6. 9. height in the sky
  7. 11. known for being most prominent in the thermosphere
  8. 13. closest to layer of the atmosphere Earth