Across
- 2. when something stays mostly the same overtime
- 5. water as a gas
- 7. an invisible gaseous substance
- 10. the process by which liquid changes into gas
- 11. liquid water droplets suspended in the air
- 12. when something becomes different overtime
- 15. the amount of air that moves as a unit
- 17. when the sun starts to disappear in the evening
- 19. a storm with thunder and lightning
- 20. the layer of the atmosphere closest to earth
Down
- 1. conditions, such as rain, clouds, and wind
- 3. to move from one place to another
- 4. a measure of how hot or cold something is
- 6. funnel shaped winds
- 8. the movement of air in a particular direction
- 9. the process by which gas becomes a liquid
- 13. something we observe to be similar over and over again
- 14. the ability to make things move or change
- 16. an arch of colors in the sky
- 18. marked by relatively high level of water vapor in the atmosphere