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Unit 7 Water
| Question | Answer |
|---|---|
| Federal Water Pollution Control Act was created in the year: | 1948 |
| Federal Water Pollution Control Act was revised in 1972 to become: | Clean Water Act |
| The Safe Drinking Water Act was created in: | 1974 |
| How many drinking water contaminants did the Safe Drinking Water Act identify? | 33 |
| The Wellhead Protection Programs were established in: | 1992 |
| What did the Wellhead Protection Program do? | established guidelines for digging wells. |
| What is used in tertiary water treatment to clean the dirty water? | charcoal |
| Ozone is used to "oxidize" contaminants. What does "oxidize" mean? | an oxygen attaches to contaminant and neutralizes it. |
| The solids that settle to the bottom of settling ponds in primary & secondary water treatment: | sludge |
| Why is water in settling ponds smelly? | it has a HUGE BOD (very little oxygen) |
| List 3 ways sludge is disposed of: | 1) fertilizer 2) dumped in ocean 3) burned |
| In step 4 of water treatment, flocs are formed. What are flocs? | tiny, sticky particles that attract contaminant and sink to bottom of pond. |
| when water is aerated, what does that mean? | air is blown into water tank to form flocs. |
| this chemical is added to treated water to strengthen teeth. | fluorine |
| this chemical is used in water treatment to kill any remaining bacterial | chlorine (some places use ozone (O3) |
| It's estimated that ___% of underground storage tanks leak | 25 |
| A high BOD value means: | LOW oxygen in the body of water; unhealthy |
| A pond is very healthy and has lots of plants and fish species. Is the BOD high or low? | LOW |
| Toxic chemical in gasoline that makes it deadly. | benzene |
| What is eutrophication? | excessive algae growth in a body of water. |
| What is the main cause of eutrophication? | an overload of PHOSPHORUS |
| List 3 human ways water is contaminated: | fertilizer & pesticide runoff; factory point pollution; leaking underground storage tanks |
| pollution coming directly from a pipe into a waterway. | point pollution |
| What is hard water? | water with tons of minerals in it such as calcium and potassium. |
| How is water made less pure NATURALLY? | minerals in rock |
| upper surface of groundwater that rises and falls dependin on the amount of rain. | watertable |
| the place underground where groundwater is held: | aquifer |
| Define watershed: | land area that drains into a body of water. |
| Define overdraft: | when more water is taken out of an aquifer than is put back in. |
| Define recharge zone: | the place on earth where water seeps into ground. |
| Where water seeps out of ground, also called a spring: | discharge zone |
| ____% of Americans get their water from public water plants. | 85 |
| List the 3 main uses of water in the US AND the percentages! | 1) agriculture(51%) 2) industrial(38%) 3) domestic (10%) |
| What percent of the human body is made of water? | 65% |
| What are the 4 parts of the water cycle? | evaporation, precipitation, transpiration, and runoff |
| the # 1 domestic use of water? | flushing toilet |
| The industry that uses the most water: | mining |
Created by:
alihammond
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