Across
- 1. the zone around earth where life can exist.
- 4. the series of processes that cycle water through the enviroment.
- 5. the gradual and usually precdictable changes of abiotic factors in an ecosystem.
- 6. a species that is likely to become endangered if factors reducing its survival are not changed.
- 8. the movement of matter through the biotic and the abiotic enviroment.
- 10. precipitation that is more acidic than usual because of chemicals in the air and water vapour.
- 14. the number of species in an area.
- 16. all of earth's water in solid, liquid and gas form.
- 18. a species that may become threatned or endangered because of a combination of factors.
- 19. a non-native species whose intentional or accidental introduction negatively impacts the natural enviroment.
- 24. refers to a species that has died out and no longer occurs on earth.
- 25. taking responsibility for managing and protecting the enviroment.
Down
- 2. harmful contaminants realeased into the enviroment.
- 3. Earth's solid outer layer.
- 7. succession on newly exposed ground, such as following a volcanic eruption.
- 9. a speies facing imminent extripation or extinction.
- 11. the layer of gases surrounding earth.
- 12. the variety of life in a particular ecosyste; also known as bilogical diversity.
- 13. a large geographical region defined by climate with a specific of biotic and abiotic factors.
- 15. the biogeochemical cycle in which carbon is cycled through all earth's atmosphere.
- 17. a cutting method where they pick and choose which trees they want to cut judging by there age and maturity.
- 20. describes the state of an ecosystem wuth relatively constant conditions over a period of time.
- 21. people who engage in enviromentally responsible travel to undisturbed natural areas.
- 22. a species that no longer exists in a specific area.
- 23. a method of cutting where they cut down all trees in a specific area.