Weather

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Across
  1. 2. Boundary between two air masses
  2. 3. Layer of gases that surrounds a planet
  3. 5. The wearing away of the earth's surface
  4. 10. The process of changing a liquid (like water) to a vapor
  5. 12. Layer A form of oxygen that has a weak chlorine odor and filters out harmful UV radiation
  6. 13. The amount of water vapor in the air
  7. 15. The imaginary line of latitude that separates the northern and southern hemispheres
Down
  1. 1. A low pressure system
  2. 4. The instrument for measuring temperature
  3. 6. The instrument for measuring wind speed
  4. 7. An instrument that measures air pressure
  5. 8. Long, narrow, ice crystal clouds that form behind planes
  6. 9. A period when a region has a lack of rainfall
  7. 11. Visible air pollution in urban areas
  8. 14. Point Temperature at which water starts to condense out of a particular air mass