Ecology Crossword

4. biological community and all the nonliving factors that affect it
5. relatively thin layer of Earth and it's atmosphere that supports life
8. process in which fixed nitrogen compounds are converted back into nitrogen gas and returned to the atomoshere
13. large of ecosystems that share the same climate and have similar types of communities
16. any living factor in an organism's environment
17. symbiotic relationship in which one organism benefits at the expense of another organism
19. act of one organism feeding on another organism
20. role, or position, of an organism in its environment

1. fixation: process in which nitrogen gas is captured and converted into a form plants can use
2. chemical substance that living organisms obtain from the environment to carry out the life processes and sustain life
3. close mutualistic, parasitic, or commensal association between two or more species that live together
6. community:all the interacting populations of different species that live in the same geographic location at the same time
7. cycle: exchange of matter through the biosphere involving living organisms, chemical processes, and geological processes
9. scientific study of all the interrelationships between organisms and their environment
10. symbiotic relationship in which one organism benefits and the other organism is neither helped nor harmed
11. factor: any nonliving factor in an organism's environment, such as soil, water temperature, and light availability
12. physical area in which an organism lives
14. symbiotic relationship in which both organisms benefits
15. a group of organisms of the same species that occupy the same geographic place at the same time
18. anything that takes up space and has mass