Across
- 4. Boundary forming between air mass
- 9. Change of state from liquid to gas
- 12. Water vapor that condenses near Earth's surface
- 13. Surface where droplets can condense on
- 14. The condition of Earth's atmosphere at a certain time and place
- 15. The amount of water vapor in the air
- 16. Balls or lumps of ice that fall from clouds during thunderstorms
- 17. An instrument to measure relative humidity
- 18. Air that moves horizontally, or parallel to the ground
Down
- 1. An instrument used by scientists to measure air pressure
- 2. Warm air mass rises over cold air mass
- 3. An instrument used to measure wind speed
- 5. An instrument that is used to measure the temperature
- 6. The measure of the transparency of the atmosphere
- 7. Any form of water that falls to Earth's surface from the clouds
- 8. The measure of how hot or cold something is
- 10. Obstacles, such as mountain ranges, forcing the mass of air upward
- 11. Collection of small water droplets or ice crystals that are suspended in the air