Human Environment Interaction Review

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Across
  1. 5. the cutting, clearing and removal of trees in a forest
  2. 8. into the
  3. 11. dangerously lacking in security or stability natural resources any physical environmental item that people perceive to be useful
  4. 12. natural resources natural resources that Earth or people can replace
  5. 15. the use of natural resources or products
  6. 18. the act or process of changing parts of something, such as the environment
  7. 19. fuels a natural source that
  8. 20. usable power that comes from heat, electricity, motion, etc.
Down
  1. 1. the removal of natural resources from the environment
  2. 2. removal a surface mining technique in which explosives are used to remove large areas of mountaintops in order to access underlying coal seams
  3. 3. potential energy
  4. 4. resources natural resources found on and in the Earth’s crust that include metals, nonmetals, and fuels
  5. 6. natural resources natural resources that cannot be replaced in a relatively short period of time
  6. 7. that is formed from the remains of once living organisms
  7. 9. acidification the process by which oceans are becoming more acidic
  8. 10. the presence in or
  9. 13. renewable energy from plants and animals
  10. 14. is a gas that occurs naturally in our atmosphere
  11. 16. layer a region located in the atmosphere several miles above the surface of the Earth
  12. 17. energy power created by splitting atoms apart of combining atoms together
  13. 21. of a substance or thing that has harmful or poisonous effects