science project

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Across
  1. 3. the outer layer in the atmosphere that keeps all of the oxygen in the atmosphere
  2. 4. when a cold air mass shoves a warm air mass
  3. 6. a huge body over an area that collects the characteristics of the area below
  4. 8. a passage underground where water travels through
  5. 9. mass divided by volume
  6. 11. what makes things fall
  7. 12. where the sun gives the most heat
  8. 13. when a warm air mass ramps up a cold air mass
  9. 15. when water vapor becomes a cloud
  10. 16. the vocab word for rain, hail, snow, or sleet
  11. 17. the technical term for air
  12. 19. when water is collected into a reservoir
Down
  1. 1. water that is under ground
  2. 2. this energy comes from the sun
  3. 3. when two cold air masses shove up a warm air mass
  4. 5. when two air masses collide and stay there
  5. 7. when water becomes water vapor
  6. 10. when water evaporates from plants
  7. 14. this comes cows when they die
  8. 18. when water goes down mountains