B4 2020 Ficker

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Across
  1. 2. also known as infrared radiation
  2. 5. what gas is 21% in the atmosphere
  3. 7. green house gases warm up the...
  4. 9. what atmospheric gas is 0.93%
  5. 10. third most influential greenhouse gas
  6. 13. the densest layer of the atmosphere
  7. 14. what layer is directly above the stratosphere
  8. 17. where did the gases come from
  9. 19. naturally occuring green house gas
  10. 20. what layer protects us from potentially harmful UV radiation
Down
  1. 1. hottest temperature in the atmosphere
  2. 3. it is essential for life to exist
  3. 4. carbon atoms continually travel from the atmosphere to the Earth and then back into the atmosphere
  4. 6. a natural process that warms earths surface
  5. 8. what is the most abundant gas in the atmosphere
  6. 11. atmosphere layer where weather occurs
  7. 12. what layer is the ozone layer located in
  8. 15. what are burning fossil fuels causing to increase
  9. 16. what causes an increase in greenhouse gases
  10. 18. what is melting from green house gases