Weather

2. Rain drops that freeze into ice pellets before reaching the ground.
5. A thinning of ozone layer over Antarctica, which occurs each spring.
6. Air that rises easily and can form clouds and rain.
8. The process of a liquid changing into a vapor or gas.
11. A soil layer below the surface of tundra regions that remains frozen permanently.
12. A temperature scale in which zero is the freezing point of water and one hundred is the boiling point.
14. A major warming if the equatorial waters in the eastern Pacific Ocean.
15. The prevalent long term weather conditions in a particular area.

1. The temperature to which the air must be cooled for water vapor to condense and form fog or cloud.
3. An instrument for measuring atmospheric pressure.
4. Liquid or solid water that falls from the atmosphere and reaches the ground.
7. A cooling of the equatorial waters in the Pacific Ocean.
9. A period of abnormally hot weather lasting several days.
10. The force exerted by the interaction of the atmosphere and gravity.
13. In summer, refers to four to seven degrees Celsius above normal.