Environmental Crossword

3. The natural process that breaks down materials at Earth's surface.
5. a Mixture of nitrogen and oxygen and other gases that extends 800 kms above Earth's surface.
7. The trend in temperature, atmospheric pressure, humidity, and precipitation over a period of many years.
9. The study of past climates.
13. Water droplets found mostly in the troposhpere.
14. The lowest layer of the atmosphere, reaching from Earth's surface 0-12 kms above the surface.
15. A major geographic region with a particular combination of environmental conditions and life forms.

1. a measurement of the quantity of water vapour in the air.
2. The clearing of trees from land.
4. a change in state from a solid directly to a gas, or from a gas to a solid.
6. The conditions of temperature, atmospheric pressure, humidity, and precipitation at a particular time and place.
8. a graphical representation of climate data for a specific region and time period.
10. the solid outer layer of Earth's surface, including the crust and the upper part of Earth's mantel.
11. any characteristic that enables an organism to better survive and reproduce in an environment.
12. The thin layer of air, land, or water on or near Earth's surface that contains all life on Earth.