Across
- 11. the process by which a community changes over time
- 12. a group of organisms of the same species that live in the same area
- 13. nonliving or never having lived
- 15. there are almost no animals left of a certain species
- 16. fuels fuels formed millions of years ago from the remains of plants and animals
- 18. to act upon or with something
- 20. living or having lived
- 21. The study of interactions between living and non living things and their environment
- 22. there are fewer of a species of animal than there used to be
Down
- 1. the part of earth where living things can exist
- 2. a group of different populations that live in the same area
- 3. all members of a species are dead
- 4. a community that changes overtime
- 5. anything added to the environment that is harmful to living things
- 6. resources that are replaced by nature
- 7. a thing that an organism uses to live
- 8. the number of individuals that an environment can support
- 9. interactions among populations in a community and the community's physical surroundings, or abiotic factors
- 10. the resources that cannot be totally replaced
- 14. The place where an organism lives
- 17. an ecosystem found over a large geographic area
- 19. rain that is caused by pollution and is harmful to organisms because it is acidic