Ecosystems

2. Organisms, like fungi and bacteria, that break down dead materials and return nutrients to the soil
6. A relationship where one organism benefits and one is harmed
9. An animal that is hunted and eaten by a predator
10. A resource that limits the size of a population
13. An interaction between two individuals that need the same resource
14. A group of different species (populations) living and interacting with one another
15. Animals that eat both plants and animals
17. Anything that is or was once alive
19. A relationship where one organism benefits and the other is neither harmed nor helped
22. Animals that only eat other animals
23. A more complex model showing how food chains connect in an ecosystem
24. Any substance or object an organism needs from its environment to survive, grow, and reproduce
25. A diagram that shows how energy decreases as it moves up a food chain
26. All the individuals of the same species living in the same space
27. All the different living things in an area
30. Organisms, like plants, that make their own food through photosynthesis

1. The maximum number of living things an ecosystem can support
3. A relationship where both organisms benefit
4. Anything that makes up the different parts of an ecosystem, is recycled in ecosystems
5. The part of Earth where life exists, including land, water, and air
7. A species that is very important to an ecosystem; if the species is removed the ecosystems changes drastically
8. A large region with a specific climate, plants, and animals
11. A step in a food chain or web, energy moves up the levels
12. Anything that is not living and has never been living
16. A simple model of how energy moves from one organism to another
18. An animal that eats other animals for food/energy
20. Animals that only eat plants
21. An animal that hunts other animals for food
28. A single living thing
29. All the living and nonliving things in an area interacting