B2 2020 Norton

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Across
  1. 2. We live in the _____
  2. 3. what layer is the ozone apart of?
  3. 6. greenhouse gases are ________ produced
  4. 8. greenhouse gases ________ heat from the sun in the atmosphere
  5. 10. The atmosphere is a _____ surrounding the earth
  6. 11. 21% of our atmospheric gases
  7. 13. without the greenhouse effect the earth would be extremely _____
  8. 14. what layer do comets burn up in?
  9. 16. What chemicals are destroying the ozone layer?
  10. 19. In the mesosphere the higher you get the _____ it is
  11. 21. the layer of the atmosphere with the highest pressure
  12. 23. CFC’s are a _________ greenhouse gas
Down
  1. 1. coldest layer of the atmosphere
  2. 4. the hottest layer
  3. 5. Whats is the boundary between two layers
  4. 6. 78% of our atmospheric gasses
  5. 7. the largest source of greenhouse gases from human activities is burning ___
  6. 8. What layer is the Aurora Borealis in?
  7. 9. what greenhouse gas is also apart of the water cycle?
  8. 12. The process that traps heat in the atmosphere
  9. 15. what greenhouse gas do humans breathe out
  10. 17. what percent is "other" when it comes to gasses in our atmosphere?
  11. 18. The thermosphere is the hottest layer because it _____ heat from the mesosphere
  12. 20. greenhouse gasses are produced from human ________
  13. 22. when the GHE is very excessive it is called ______ GHE