Unit 7: Air Pollution, Crossword 2

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Across
  1. 3. A species that shows the health of an ecosystem
  2. 4. Process where traits that help survival are passed on
  3. 8. When two species use the same resources
  4. 11. Cycle that moves matter through Earth's systems
  5. 12. The area where a species is found
  6. 13. Process of converting nitrogen into usable forms
  7. 15. The range of conditions an organism can survive
  8. 17. A boundary where two ecosystems meet
  9. 19. Movement of phosphorus through rocks, water, and living things
  10. 20. A species with a broad niche
  11. 23. One organism benefits while the other is harmed
  12. 24. A nonnative species that harms ecosystems
  13. 25. Both species benefit from the interaction
Down
  1. 1. Something that restricts population growth
  2. 2. Change in a species over time
  3. 5. A trait that helps an organism survive
  4. 6. One species hunts and eats another
  5. 7. Movement of carbon through the biosphere
  6. 9. A species that naturally belongs in an area
  7. 10. Movement of water through Earth
  8. 14. A place where a substance is stored in a cycle
  9. 16. Changes that occur at habitat boundaries
  10. 18. A species with a narrow niche
  11. 21. A close long-term interaction between species
  12. 22. One benefits and the other is not affected