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