Across
- 2. part of earth where organisms can live
- 6. a ___ community is stable and contains many types of organisms
- 7. something harmful to organisms that is added to an environment
- 8. living factors in an environment
- 10. rain that contains sulfuric or nitric acid
- 12. ecosystem covering a large area like an ocean or a desert
- 15. resources Earth cannot replace, such as minerals
- 17. an __ is all the interactions among the populations of a community and its nonliving parts
Down
- 1. used by organisms to live; water, air, sun
- 3. when a species have few members left
- 4. all organisms ___ with living and nonliving things
- 5. fuel formed long ago from remains of organisms
- 9. various populations living in one area
- 11. number of an organism living in a set area
- 13. place an organism lives
- 14. process by which a community changes over time
- 16. study of interactions among living and nonliving parts of an environment