Across
- 3. something that repeats, happens again and again
- 7. when matter changes from a gas to a liquid
- 10. a large body of air that has the same temperature and humidity
- 17. the clouds that look like a big, gray blanket
- 18. the amount of water vapor in the air
- 19. the layer of gases around Earth
- 20. the condition of the air outside during a certain time
- 21. the big, fluffy kind of white clouds
Down
- 1. the place where two different air masses meet and cause a storm
- 2. when matter changes from a liquid to a gas
- 4. a group of small drop of water and ice that join together
- 5. a strong force of wind
- 6. describes something that has water on it
- 8. describes something that has little or no water
- 9. how heavy or light the air is
- 11. the gas form of water
- 12. very thin clouds
- 13. the thick, tall clouds that can produce heavy rain, lightning and thunder
- 14. a soft wind
- 15. the usual weather for a region
- 16. the movement of air outside caused by warm and cool air meeting