Across
- 1. lakes are those that are unproductive
- 3. the use of chemicals by an organism to break the object down
- 6. pollution of water or air that does not originate from a single discrete source
- 7. excessive plant and algal growth due to the increased availability of one or more limiting growth factors needed for photosynthesis
- 11. this phenomena depletes dissolved oxygen and kills off fish and marine organisms in bottom waters
- 12. any single identifiable source of pollution from which pollutants are discharged, such as a pipe, ditch, ship or factory smokestack
- 13. a method used to extract natural gas and oil from deep rock formations known as shale
- 14. infections that predominantly are transmitted through contact with or consumption of microbially polluted water
Down
- 1. the reduction in dissolved oxygen, plotted over a distance along a water body from a point at which sewage or other pollutants have been discharged
- 2. rapid increase in the density of algae in an aquatic system
- 4. used water
- 5. a process that occurs when human water pollution speeds up by introducing sewage, detergents ,fertilizers and other sources of nutrients in an aquatic ecosystem
- 8. areas of water bodies where aquatic life cannot survive because of low oxygen levels
- 9. water body has lost so much of its dissolved oxygen that normal aquatic life begins to die off
- 10. when you add water to concentrated orange juice you are ____ it