Chapter 3

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Across
  1. 2. a species that no longer exists in a specific area
  2. 4. The process of establishing and replacing a community following a disturbance
  3. 8. The variety of life found in an area
  4. 9. A volcanic eruption is an example of this
  5. 10. Acids move through the water cycle, sometimes over long distances, before returning to earth in this form
  6. 13. a species facing imminent extirpation or extinction
  7. 14. harmful contaminants released into the environment
  8. 15. Introduced species with growing populations that spread and have a negative effect on their environment
  9. 16. species are likely to become endangered if current trends and conditions continue
Down
  1. 1. Taking responsibility for managing and protecting the environment
  2. 3. The number of species in an area
  3. 5. may become threatened or endangered because of a combination of factors
  4. 6. A forest fire is an example of this
  5. 7. on a large scale, most natural ecosystems are in this state
  6. 11. Certain minerals particularly one is able to do this.
  7. 12. A species no longer found on earth