Chapter 21 Weather

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Across
  1. 3. two air masses of different properties collide with each other
  2. 4. this forms when water vapor in the air passes over a cooler area
  3. 5. rarely moves above freezing
  4. 7. a narrow belt of high-speed upper atmosphere winds
  5. 10. one who observes, records and make predictions about the weather
  6. 15. a violent disturbance in the atmosphere caused by the collision of different types of fronts
  7. 16. used to show the direction of the wind
  8. 17. raindrops that pass through extremely cold layers of air that freeze and become ice pellets
  9. 19. a very powerful cyclone that forms over tropical waters
Down
  1. 1. when molecules within a cloud rub against each other building up a static charge
  2. 2. bottom layer of the atmosphere
  3. 6. the flow of air from sea to land
  4. 8. predicting the weather
  5. 9. a device used to measure atmospheric pressure
  6. 11. beyond the thermosphere.
  7. 12. heat moving in waves
  8. 13. a type of front when different types of air masses meet and stall
  9. 14. the study of the changes that take place in a particular spot within the atmosphere.
  10. 18. moisture(water vapor)in the air
  11. 20. a type of cloud that looks like a cotton ball