Ecology

2. eats dead animals
3. all the members of one species living in an area
4. an environmental factor that is not alive, never lived, and was not part of something living
5. living or once living (and now dead) or made by something that was alive
7. being dependent on others for some needs, being mutually dependent on each other
11. both species benefits from the relationship
12. one living thing
13. eats plants
14. makes its own food
15. a close relationship between species that benefits at least one of the species
18. is how an ecosystem changes over time
20. eats both plants and meat
21. eats meat
22. all of the living and nonliving things that interact in an area

1. animals use food to make sugar and turn it into carbon dioxide
3. one species benefits, the other is harmed in some way
6. the variety of life (or species) on earth
8. recycles dead organisms and waste
9. plants use water, sunlight and carbon dioxide to make sugar and oxygen
10. one species benefits, the other is neither helped nor harmed
16. cycle bacteria takes nitrogen from the air and changes it into a form that can be used by plants
17. must eat something for energy
19. all of the different populations living in an area (no abiotic factors)