Atmosphere (Ch 15)

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Across
  1. 3. a type of precipitation lace with acid that can be harmful (467)
  2. 6. air _?_ is the force exerted by air on the area below it
  3. 9. pollution that forms over cities
  4. 11. warm air is less dense than _?_ air
  5. 12. combines chemically with fuel such as wood, gasoline (453)
  6. 13. the atmosphere is composed of 78% _?_ (452)
  7. 14. _?_ humidity is a ratio of water vapor that the air can hold
  8. 17. extends 11-50 km above sea level and holds pollutants
  9. 22. these conditions can result from air pollutants (464)
  10. 24. the transfer of energy through space
Down
  1. 1. large body of air
  2. 2. only certain kinds of these can use atmospheric nitrogen (453)
  3. 4. the lowest layer of the atmosphere, contains "weather"
  4. 5. transfer of energy by contact
  5. 7. transfer of energy by movement of fluids
  6. 8. water vapor becomes liquid in this process (454)
  7. 10. carbon _?_ is a primary air pollutant (463)
  8. 15. the atmosphere transports and recycles _?_ (452)
  9. 16. _?_ air can hold more water vapor than cold air (454)
  10. 18. thin layer of gases that surrounds earth
  11. 19. caused sculpture damage in Greece (461)
  12. 20. this instrument measures air pressure (455)
  13. 21. _?_ practices can strip plants from the soil (462)
  14. 23. this layer scatters (harmful) UV rays