Across
- 1. the border where 2 air masses meet
- 4. instrument used to measure precipitation
- 7. low layer clouds: dark: sometimes bring light rain
- 9. high altitude clouds; made of ice crystals
- 10. a large body of air that forms over a land mass or large body of water
- 11. water falls to the ground in the form of rain, sleet, snow and hail
- 13. the layer of air that surrounds our planet
- 14. towering dark clouds; rain on its way
- 15. water that flows over the ground
- 17. puffy cotton-ball clouds; seen on clear, warm days
- 18. an instrument used to measure water vapor in the air
- 19. an instrument used to measure wind speed
Down
- 2. plants release water as a gas
- 3. an instrument used to measure wind speed
- 5. water changing from a liquid to a gas
- 6. water vapor in the atmosphere condenses to form clouds
- 8. water is stored in lakes, rivers and oceans
- 12. all the particles of air pressing down on the surface of the earth
- 16. water vapor in the air