Across
- 2. the average height of a ____ when mature is 87.6
- 3. what layer of the atmosphere absorbs almost all of the sun's harmful ultraviolet light?
- 7. when we have a common resource and use it to each individual's maximum
- 8. excessive richness of nutrients in a lake or body of water due to runoff from the land which causes dense growth of plant and animal life due to the lack of oxygen
- 9. a cost of burden that is shifted to a outside person or group
- 13. clean water found in spaces
- 16. waste is burned to generate electricity
- 17. able to harm at a low level
- 20. a distinct group of individuals
- 22. a area of land that drains the streams and rainfall to a common outlet
- 23. process of change in a species structure of ecological community
- 24. the study of harmful effects of any material on organisms
- 26. the particulates that are most harmful are
- 27. used to clean up toxic waste dumps
- 28. the _____ helps prevent future "Love Canal" disasters, tracking down the waste and makes sure it is properly disposed of
- 29. _____ is not yet gone, but may be lost in near future
Down
- 1. variety of life in the world
- 2. which layer of the atmosphere has most of the weather?
- 4. removal of soil causes ___ to increase
- 5. the study of how diseases are spread
- 6. what act sets the national standards for safe drinking water
- 10. when some chemicals get concentrated up the food chain
- 11. ph lower than 5
- 12. air pollution that reduces visibility
- 14. what layer does soil have the most life and roots?
- 15. identify and trace source of pollution
- 18. best management practice to reduce runoff
- 19. makes the dirt rich when decomposed
- 21. which layer of the atmosphere has the ozone layer?
- 25. the spaces in the ground that can hold water between soil particles