Water Quality & Bioindicators (Tabat)
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| What is the main reason scientists monitor the water quality of streams, lakes & other water sources? | to protect the health of humans
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| What is the reason macroinvertibrates are used as water quality indicators? | They are sensitive to changes in the ecosystem and many live in an aquatic ecosystem for over a year.
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| Why is filtration an important part of water treatment? | filtration removes small particles from the water
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| Why does a scientist use nets to capture and count organisms in a river? | to measure biodiversity
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| What substance is used on a sewage treatment system to kill harmful bacteria? | chlorine
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| What is the difference between primary and secondary sewage treatment? | primary treatment removes the solid materials
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| What class of macroinvertebrates indicate polluted streams, lakes or rivers by their absence? | class I
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| What profession most likely includes daily monitoring of the hydrosphere? | meteorologist
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| What can households do to help the local wastewater treatment facility function properly? | flush only human waste and toilet paper down the toilet
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| How can frogs be used to indicate the health of a water system? | they will sicken or die in a polluted environment
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| Why are water quality standards necessary? | to prevent water from having excessive levels of pollutants
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| How will turbidity most likely affect a watershed? | water temperatures will increase and dissolved oxygen levels will decrease
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| What is the greatest impact of large quantities of sediment flowing into North Carolina's rivers and streams? | sediment prevents light from reaching plants
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| What profession studies the quantity, distribution, circulation and physical properties of all bodies of water? | hydrologist
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| Why does a flood have the greatest impact on local water quality? | it allows many foreign materials to enter the water
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| Why should a community develop a clean water source? | they are concerned about the health of themselves and their environment
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| How can communities best determine if methods used to maintain water quality can justify the economic trade-offs involved? | by evaluating health benefits of higher water quality
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| Why are Americans warned to avoid drinking the water when visiting other countries? | water in other countries may not be treated and could cause illness
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| What was the 1948 Federal Water Pollution Control Act? | the first major US law to address water pollution
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| What year was the Clean Water Act passed? | 1972
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| Why do scientists monitor macroinvertebrates and other species such as frogs? | to check the quality of water in a stream, lake or river
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| Why do communities not use tertiary water treatment? | the cost is too high
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| What does the tertiary water treatment do? | it removes almost 100% of waste in the water
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| What is the critical factor in determining habitat suitability for aquatic organisms? | concentration of dissolved oxygen
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| How can humans most directly influence what happens in a river basin in a positive way? | protect the soil, air, water, plants and animals
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| What activity in a river basin would most likely contribute to the pollution of a river? | using a hose to wash motor oil from an asphalt driveway
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