Across
- 2. an animal that hunts and kills other animals for food
- 4. a symbiotic relationship in which one organism benefits and the other is harmed
- 9. the process in which water vapor is released into the air from the leaves of plants
- 10. the movement of nitrogen among living organisms, the air, and the ground
- 11. the process in which dead organisms are broken down
- 14. the conversion of nitrates and other compounds containing nitrogen into nitrogen gas
- 17. a relationship in which one animal hunts, kills, and eats another
- 18. the continuous movement of water between Earth's surface and its atmosphere
- 21. a symbiotic relationship in which one organism benefits and the other neither benefits nor is harmed
- 23. water that flows over the land without sinking into the ground
Down
- 1. an animal that is hunted by other animals for food
- 2. an organism that lives in or on another organism and benefits at the other organism's expense
- 3. a process by which a liquid changes to a gas
- 5. a close relationship between two different species of organisms living together
- 6. a helpful interaction among organisms living in a limited area that aids each organism's survival
- 7. the process that converts nitrogen in the atmosphere into compounds in the soil that are useful to a variety of organisms
- 8. to live in the same habitat without competing
- 12. water that falls to Earth's surface in the form of rain, sleet, hail, or snow
- 13. an interaction that occurs when organisms try to get the same resources
- 15. the process by which a gas changes to a liquid
- 16. an organism that a parasite live in or on
- 19. water located below Earth's surface
- 20. the movement of carbon among living organisms, the air, and the ground
- 22. a symbiotic relationship between two organisms in which both organisms benefit