Ecosystems

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Across
  1. 4. active during the day
  2. 5. nonliving components in an ecosystem
  3. 6. an organism that is not native to a habitat
  4. 8. raw materials sourced from nature
  5. 10. at risk of becoming extinct
  6. 11. the variety of life on earth
  7. 12. moving to a new area
  8. 13. using resources wisely
Down
  1. 1. too many animals in a population
  2. 2. protecting ecosystems
  3. 3. living components in an ecosystem
  4. 7. all the living and nonliving things in an area
  5. 8. active at night
  6. 9. a period of nonactivity