Chapter 5 crossword

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Across
  1. 5. philosophy that lets people use resources that dont harm the environment
  2. 6. nonnative species in an area
  3. 7. variety of life in an area
  4. 9. programs that release species into an area that the once lived
  5. 11. damage to a habitat by air
  6. 12. natural strips of land that let species migrate from one area to another
  7. 13. species that are close to becoming endangered
  8. 15. members of species held by people
Down
  1. 1. field of biology that studies methods and implements plans to protect biodiversity
  2. 2. different environmental conditions that occur along boundaries of an ecosystem
  3. 3. layer of the atmosphere that helps protect living organisms on Earths surface from damage from ultraviolet radiation from the sun
  4. 4. rain,snow,sleet, or fog with a pH below 7
  5. 8. separation of wilderness areas from each other
  6. 10. species that are very close to becoming extinicted
  7. 14. when the last member of a species dies