Air Pressure

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Across
  1. 2. clear sunny skies; fair weather (3 words; no space)
  2. 5. cloudy skies; possibly precipitation (3 words; no space)
  3. 9. virtually all weather occurs here
  4. 10. most abundant gas in the atmosphere
  5. 11. as altitude _____, air pressure decreases
  6. 12. tool used collect air pressure data
Down
  1. 1. unit to measure air pressure
  2. 3. temperature increases with altitude in this layer
  3. 4. a person who studies weather
  4. 6. makes up 21% of air
  5. 7. force that pulls down air molecules
  6. 8. as altitude _____, air pressure increases