1. air Smog from factories can pollute the AIR.

2. climate A tropical CLIMATE is typically hot and wet throughout the year with heavy, frequent rainfall.

3. earthquake An EARTHQUAKE can cause major damage to and ecosystem.

4. landform

5. landslide

6. mountain

7. natural resource

8. plain bison grazing on the Great PLAINS in the Midwestern United States

9. precipitation drizzle rain sleet dry snow wet snow

10. rain gauge

11. valley Death Valley National Park California & Nevada, USA Schroters Valley on the Moon, photographed by Apollo 15

12. weather

13. weathering

14. wind vane