AB4 2021 Xie

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Across
  1. 2. the burning of this creates carbon dioxide
  2. 4. what burns up in the mesosphere
  3. 6. temperature does what as altitude increases in the stratosphere
  4. 8. the celestial body that warms up the earth
  5. 10. gas used as a refrigerant that depleted the ozone layer
  6. 11. outermost layer of the atmosphere
  7. 13. gas produced during photosynthesis
  8. 16. the mass cutting down of trees
  9. 18. layer where pilots tend to fly
  10. 19. a greenhouse gas produced by human activities
  11. 20. a gas that absorbs part of the sun's energy
Down
  1. 1. temperature does what as altitude increases in the troposphere
  2. 3. coldest layer of the atmosphere
  3. 5. layer where the Aurora Borealis is
  4. 7. the heating of the earth's climate
  5. 9. 3rd most common gas in the atmosphere with the symbol Ar
  6. 12. gas in a layer that protects us from UV rays
  7. 14. gas making up the majority of the atmosphere
  8. 15. greenhouse gas produced by cattle
  9. 17. layer where weather occurs