Across
- 3. any material in nature that people use and value
- 9. semi-dry grasslands or prairies
- 12. the clearing of trees
- 13. permanently frozen layers of soil
- 15. influences climate
- 16. group of plants and animals in an environment
- 20. to die out
- 21. winds that blow in the same direction over a large area Earth
Down
- 1. decayed plant or animal matter
- 2. winds that bring dry or moist air
- 4. resources that Earth replaces n
- 5. nonrenewable resources that formed from ancient plant and animals
- 6. dry temperate tropical polar highland
- 7. spread of desert like condition
- 8. place where a plant or animal lives
- 10. occurs near the equator in low latitudes
- 11. occurs near the poles
- 14. warm current that flows along the east coast
- 17. large streams of surface seawater
- 18. areas of tall grasses and scattered trees, shrubs
- 19. place where two air masses meet