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