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Water Quality
| Question | Answer |
|---|---|
| Contaminant contained in fertilizers and pesticides from farms | nitrates |
| water systems overloaded with nutrients undergoes which process? | eutrophication |
| Characteristic that makes an organism a good bioindicator? | organism that is sensitive to slight physical or chemical changes |
| How can organisms like frogs be used to indicate the health of a water system? | animals will sicken or die in a polluted environment |
| How does high turbidity in a watershed affect water temperatures and dissolved oxygen? | water temperatures increase dissolved oxygen levels decrease |
| How might fertilizer runoff from a farm or golf course affect the quality of water in a pond? | promotes algae growth which lowers dissolved oxygen levels |
| A decrease in pH of a body of water can do this | cause large organisms in the body of water to begin to die |
| two nonpoint pollutants most directly linked to agriculture: | bacteria and excess nutrients |
| a student creates a model of a stream in a forested mountain watershed. He wants to show how the stream could be overloaded with sediment. What should he include in his model? | acres of cleared forest above the stream |
| Which water quality indicator measures how light travels through water? | turbidity |
| Which type of organisms would most likely flourish in water near agricultural areas? | plants because of excess ferilizers |
| A process that would increase dissolved oxygen in freshwater lakes | photosynthesis |
| excessive amounts of nutrients contaminating surface and groundwater supplies cause this to happen | speed up eutrophication process |
| Which may cause scientists to be concerned about the quality of lake water? | high levels of nitrates |
| a pH of 7 most likely indicates this | the water is safe to drink |
| The pH of a lake is lowered (becomes more acidic) from 6.7 to 5.9. What effect would this have on the organisms in a river basin? | Some organisms would adapt to the new pH, while others that could not would die |
| What does high turbidity of a water body do to the dissolved oxygen levels? | the higher the turbidity, the lower the dissolved oxygen levels |
| The daily release of hot water into a pond from a local factory could have what affect? | the health of the fish in the pond would be affected |
| Increase in levels of nitrates and phosphates (nutrients) entering a body of water would | increase plant growth |
Created by:
8teach8