ecolgy review

2. succession occurs after a forest fire
5. makes its own food
7. fixation bacteria take nitrogen from the air and change it into a form that can be used by plants
8. [by plants] water, sunlight, carbon dioxide
10. must eat something for energy
12. recycles dead organisms and waste
17. eats meat
18. the variety of life [or species] on earth
20. [by animals] food\glucose
22. all of the different populations living in an area [no abiotic factors]
23. factor living or once living [and now dead] or made by something that was alive

1. all the members of one species living in an area
3. pyramids show the amount of energy that moves from one energy level to the next
4. eats plants
6. being dependent on others for some needs, being mutually dependent on each other
9. eat both plants and animals
11. how an ecosystem changes overtime
13. provides the energy for food chains
14. one living thing
15. larger particles allow it to drain quickly
16. all of the living and nonliving things that interact in an area
19. succession occurs after a volcanic eruption forms new land [where there is no soil]
21. factor environmental factor that is not alive, never lived, and was not part of something living