Water Quality
Help!
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| Contaminant contained in fertilizers and pesticides from farms | nitrates
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| water systems overloaded with nutrients undergoes which process? | eutrophication
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| Characteristic that makes an organism a good bioindicator? | organism that is sensitive to slight physical or chemical changes
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| How can organisms like frogs be used to indicate the health of a water system? | animals will sicken or die in a polluted environment
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| How does high turbidity in a watershed affect water temperatures and dissolved oxygen? | water temperatures increase
dissolved oxygen levels decrease
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| 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
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| A decrease in pH of a body of water can do this | cause large organisms in the body of water to begin to die
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| two nonpoint pollutants most directly linked to agriculture: | bacteria and excess nutrients
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| 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
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| Which water quality indicator measures how light travels through water? | turbidity
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| Which type of organisms would most likely flourish in water near agricultural areas? | plants because of excess ferilizers
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| A process that would increase dissolved oxygen in freshwater lakes | photosynthesis
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| excessive amounts of nutrients contaminating surface and groundwater supplies cause this to happen | speed up eutrophication process
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| Which may cause scientists to be concerned about the quality of lake water? | high levels of nitrates
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| a pH of 7 most likely indicates this | the water is safe to drink
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| 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
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| What does high turbidity of a water body do to the dissolved oxygen levels? | the higher the turbidity, the lower the dissolved oxygen levels
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| 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
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| Increase in levels of nitrates and phosphates (nutrients) entering a body of water would | increase plant growth
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