417802
| Questão | Responda |
| What is water pollution? | Any physical, biological or chemical change in water quality that effects it's living organisms. |
| What are point source and non-point sources? | Point source is pollutant discharges from specific locations. Non-point sources is scattered and diffused. |
| What are some infectious agents? | main source of waterborne pathogens is improperly treated human waste |
| What are "oxygen demanding wastes?" | water with oxygen level of >6ppm will support aquatic life. Water with oxygen level >2ppm will only support detritevors and decomposers |
| How is oxygen cycled? | Oxygen added by plant photosynthesis and removed by respiration and oxygen-demanding processes. |
| What are the 5 Trophic levels of Lakes from worst to better. | Oligotrophoc Dystrophic Mesotrophic Eutrophic Hypertrophic |
| How much production does a lake need to be consisdered Dystrophic? | Unproductive, acidic and poor nutrients. |
| What does it mean to be a "oligotrophic lake"? | Unproductive, with sparse supply of nutrients. |
| What does Mesotrophic mean? | That a lake is in an intermediate condition. |
| What does Eutrophic mean? | Highly productive, due to an abundant supply of nutrients. |
| What does Hypertrophic mean? | Most productive of them all. Extremely productive. |
| What does Eutrophication mean? | Large increase in primary productivity of a body of water, ocuring in response to the addition of nutrients. |
| Explain limiting factors | It is the rate of an ecological process that is limiting. What factor that is available least compared to biological demand. |
| What is Oxygen Demand? | The amount of dissolved oxygen consumed by microorganisms. |
| Explain Oxygen Sag | O levels decline downstream from a pollution source as decomposers metabolize waste materials. |
| What are some problems with releasing raw sewage? | Causeing oxygen depletion from decompostion of organic matter. Pollution form fecal pathogens. Pollution by potential toxins. |
| What are some common nutrients in fresh water and open waters? | PO4-3<-- nutrients in freshwater NO3- <-- butrients in open water |
| What are two Hydroelectric Developments? | Run-of-the-river Dams and Impoundments |
| What is hydro electricity? | A renewable source of electricity but causes environmental damage. |
| What is thermal Pollution? | Raising or lowering water temperature from normal levels. |
| What are two forms of water pollution control? | Source Reduction Sewage Treatment |
| What is Source Reduction? | It's the easier and cheapest way to reduce pollution.. reduce the amount of toxins you use in the first place (Ex: using less road salt so it doesn't leak so much into fresh water lakes) |
| What are the three Stages of Sewage treatment? | Primary--> separation of large solids Secondary--> degradation of DOM Tritiary--> Chlorination and removal of plant nutrients |
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