Across
- 1. a closed system where life exists
- 2. Gaseous Tri-oxygen layer that protects the earth from solar radiation
- 5. an area where all streams feed into a larger body of water
- 9. a vehicle that uses two or more power sources
- 11. taking action to protect a part of the environmental system from harm
- 12. a count of all the members of an organism in a specific area
- 13. a system of organisms working together in a defined area
- 14. two organisms with a mutually beneficial relationship (algae or lichens)
- 15. where all weather systems remain on one side of a mountain chain
- 16. a hydrogen ion fuel system
Down
- 1. a former industrial area where nothing grows
- 3. the role or job an organism has in an ecosystem
- 4. management of a segment of an ecosystem
- 6. when you cannot identify the origination point of a pollutant
- 7. when more individuals of a species are dying than being born
- 8. when all members of a species on earth are dead
- 9. the community where organisms live together in a system
- 10. when a threatened species reaches a critical number below which extinction is likely
- 17. a single environment and every living organism and non-living factor that is contained within it