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8Sci_Water Quality-1
Water Quality & Bioindicators (Tabat)
| Question | Answer |
|---|---|
| What is the main reason scientists monitor the water quality of streams, lakes & other water sources? | to protect the health of humans |
| 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. |
| Why is filtration an important part of water treatment? | filtration removes small particles from the water |
| Why does a scientist use nets to capture and count organisms in a river? | to measure biodiversity |
| What substance is used on a sewage treatment system to kill harmful bacteria? | chlorine |
| What is the difference between primary and secondary sewage treatment? | primary treatment removes the solid materials |
| What class of macroinvertebrates indicate polluted streams, lakes or rivers by their absence? | class I |
| What profession most likely includes daily monitoring of the hydrosphere? | meteorologist |
| What can households do to help the local wastewater treatment facility function properly? | flush only human waste and toilet paper down the toilet |
| How can frogs be used to indicate the health of a water system? | they will sicken or die in a polluted environment |
| Why are water quality standards necessary? | to prevent water from having excessive levels of pollutants |
| How will turbidity most likely affect a watershed? | water temperatures will increase and dissolved oxygen levels will decrease |
| What is the greatest impact of large quantities of sediment flowing into North Carolina's rivers and streams? | sediment prevents light from reaching plants |
| What profession studies the quantity, distribution, circulation and physical properties of all bodies of water? | hydrologist |
| Why does a flood have the greatest impact on local water quality? | it allows many foreign materials to enter the water |
| Why should a community develop a clean water source? | they are concerned about the health of themselves and their environment |
| 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 |
| 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 |
| What was the 1948 Federal Water Pollution Control Act? | the first major US law to address water pollution |
| What year was the Clean Water Act passed? | 1972 |
| Why do scientists monitor macroinvertebrates and other species such as frogs? | to check the quality of water in a stream, lake or river |
| Why do communities not use tertiary water treatment? | the cost is too high |
| What does the tertiary water treatment do? | it removes almost 100% of waste in the water |
| What is the critical factor in determining habitat suitability for aquatic organisms? | concentration of dissolved oxygen |
| How can humans most directly influence what happens in a river basin in a positive way? | protect the soil, air, water, plants and animals |
| 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 |
Created by:
masonteach
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