Across
- 3. an abandoned piece of land that is contaminated of a hazardous substance
- 5. species that has so few members left that it is in danger of extinction
- 10. Group of populations that interact with each other
- 11. a molecule of three oxygen atoms that exists in the stratosphere to block out UV radiation
- 12. A group of organisms living together that belong to the same species
- 15. preservation of natural resources
- 17. species that are losing members at a rage such that they will quickly become endangered
- 19. a system of generating electricity to move a car by chemical reaction
Down
- 1. vehicles that use a small gas powered engine and an electric motor
- 2. a region draining water into any body of water
- 4. Walking or busing to decrease air pollution
- 6. a state where a species has no members left
- 7. organisms of different species that live together to gain advantages from one another to survive
- 8. The living community and nonliving factors that affect it
- 9. The part of earth that contains and supports life
- 13. A place where an organism obtains nourishment, shelter protection from enemies and space
- 14. an area that shares the same air due to geography, weather and climate
- 16. pollutant that enter water systems from runoff because there is no way to identify the source of pollution
- 18. role of a species in its community