Weather

4. Rain drops that freeze into ice pellets before reaching the ground.
5. A thinning of ozone layer over Antarctica, which occurs each spring.
7. Liquid or solid water that falls from the atmosphere and reaches the ground.
10. Air that rises easily and can form clouds and rain.
13. The temperature to which the air must be cooled for water vapor to condense and form fog or cloud.
14. The prevalent long term weather conditions in a particular area.
15. In summer, refers to four to seven degrees Celsius above normal.

1. The force exerted by the interaction of the atmosphere and gravity.
2. A soil layer below the surface of tundra regions that remains frozen permanently.
3. An instrument for measuring atmospheric pressure.
6. The process of a liquid changing into a vapor or gas.
8. A major warming if the equatorial waters in the eastern Pacific Ocean.
9. A cooling of the equatorial waters in the Pacific Ocean.
11. A period of abnormally hot weather lasting several days.
12. A temperature scale in which zero is the freezing point of water and one hundred is the boiling point.