Environmental & Natural Resources

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Across
  1. 3. The mixture of gases that cover the earth. It contains a mixture of nitrogen, oxygen,carbon dioxidem hydrogen, argon,& others.
  2. 4. The wise use of resources.
  3. 5. ______ animal has gone back to being wild.
  4. 6. ____________ agriculture is using practices that make it possible to produce forever.
  5. 8. ________________ natural resource is not replaced after it is used.
  6. 10. Our surroundings
  7. 12. The physical area where an organism lives.
  8. 13. ____________________ species is one threatened with becoming extinct.
  9. 15. The complete disappearance of organisms from the earth.
  10. 16. Sustainable ________________ means people use no more than they need.
  11. 17. Reusing the materials used to make a product.
  12. 18. _______ is a material used to provide energy. They are formed over thousands of years by decay of plants & animals materials.
Down
  1. 1. All living things that have not been domesticated.
  2. 2. Keeping resources without using them.
  3. 7. __________________ fuel is a fuel that is typically not a fossil fuel.
  4. 9. __________________ natural resource is one that replaced after it is used.
  5. 11. A material that has never lived. Made of inorganic chemical elements.
  6. 14. The loss of soil by water or wind.
  7. 19. The outer layer of the earth's surface. It supports terrestrial plant life.