ecosystem

3. An organism that makes its own food, such as plants.
7. An organism that hunts and eats other organisms.
8. A factor that restricts the growth or abundance of a species.
11. The role and position a species has in its environment.
14. Electromagnetic radiation with a wavelength shorter than visible light.
16. An organism that breaks down dead organic matter, such as bacteria and fungi.
17. A close relationship between two species in which both species benefit.
18. A large, geographically defined area of land or water with distinct climate, vegetation, and animal life.
19. A complex network of interconnected food chains.

1. The natural environment of a particular species.
2. A species that has a disproportionately large effect on its environment relative to its abundance.
4. A level in a food chain or web, such as primary consumer or top predator.
5. An organism that is hunted and eaten by another organism.
6. The variety of living organisms in a given area.
9. A group of living organisms that interact with each other in a particular environment.
10. An organism that produces its own food, such as plants.
12. A sequence of organisms in which each organism is eaten by the next organism in the chain.
13. A community of living organisms and their physical environment.
15. Non-living components of an ecosystem, such as soil, rocks, and water.
17. The gradual replacement of one species by another over time.