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