chapter 3- Natural Ecosystems and stewardship- Dakota

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Across
  1. 4. the state of an ecosystem over a period of time
  2. 5. species that could become endangered
  3. 9. two words precipitation that has a factor that it doesn't most of the time
  4. 11. two words non-native species that impact the environment
Down
  1. 1. harmful things released into the environment
  2. 2. species that died and no longer on Earth
  3. 3. life in a particular ecosystem
  4. 6. two words a species that can become threatened form certain factors
  5. 7. two words a partially disturbed ecosystem like following a forest fire
  6. 8. number of species in an area
  7. 10. protecting the environment
  8. 12. changes in a composition of a community following a disturbance