Air Masses and Weather Fronts

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Across
  1. 3. A measure of how much water vapor is in the air
  2. 4. An instrument used to measure temperature
  3. 5. The layer of the atmosphere closest to earth
  4. 7. Cold air sinks because more ______ than warm air
  5. 9. Water changes from liquid to gas
  6. 13. The long-term pattern of weather in a particular area
  7. 14. An instrument used to measure wind speed
  8. 16. The layer of gasses that surround Earth
  9. 18. An instrument used to measure the amount of rainfall
  10. 19. The condition of Earth's atmosphere at a specific time and place
  11. 21. Winds that blow in one direction, moving air masses
  12. 22. A type of weather front where cold air masses overtake warm air masses
  13. 24. Water changes from gas to liquid
Down
  1. 1. A type of front where two air masses collide, but neither pushes the other out of the way
  2. 2. A person who predicts the weather
  3. 6. Any form of water, liquid or solid, that falls from the atmosphere to the Earth's surface, primarily as rain, snow, sleet, or hail
  4. 8. The boundary between two air masses
  5. 10. A weather front where an air mass gets separated from the ground
  6. 11. An instrument used to determine the direction of the wind
  7. 12. An instrument used to measure air pressure
  8. 15. A type of weather front where warm air masses overtake cold air masses
  9. 17. The circulation of air due to heating and cooling molecules
  10. 20. A large body of air with roughly the same temperature and humidity
  11. 23. The most abundant gas we breathe