B1 Jack H

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Across
  1. 2. used to measure air pressure
  2. 5. air mass that orginates from the continent or land
  3. 7. layer that planes can fly
  4. 8. greenhouse gas that is produced by cows
  5. 10. 31% of the air is made up of this
  6. 12. air mass that originates in the tropics or near equator
  7. 13. Mount Everest has ____ air pressure than sea level.
  8. 14. most used greenhouse gas by man
  9. 15. lines that connect points of equal pressure together
  10. 16. How many types of precipitation?
  11. 17. Trees take in carbon dioxide and release _____.
  12. 19. air mass originating in the polar region
  13. 20. Humid air mass
Down
  1. 1. most top layer of the atmosphere
  2. 3. layer that burns up meteors
  3. 4. Lousy Weather
  4. 6. most abundent gas in atmosphere
  5. 9. Fair Weather
  6. 11. most common greenhouse gas
  7. 15. layer where the auroas (northern lights) are.
  8. 18. air mass that is most responsible for our weather (N.C.)