Exam #2
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Bioconcentration | The process by which a compound becomes more concentrated in an organism because of the compound being more soluble in fatty tissue
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| Biomagnification | A chemical whose concentrations increase along the food chain (occurs over time) ex. Eating a lot of fish a person can accumulate a lot of mercury.
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| BCF | Bioconcentration Factor, the equilibrium ratio of the concentration of a specific chemical in a fish relative to that in the surrounding water
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| Acute Toxicity | rapid onset of symptoms
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| Chronic Toxicity | continuous, long-term exposure to a relatively low individual doses of a toxic chemical that is present in the air we breath, the water we drink, or the food we eat
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| LD50 | The dose that proves to be lethal to 50% of the population of test animals
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| NOEL | No observable effects level, threshold.
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| Thermal Pollution | river of lake water that has been artificially warmed, at equilibrium, it will contain less oxygen than colder water because of the decrease in gas solubility with increasing temperature
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| COD | chemical oxygen demand, a faster way to determine the oxygen demand of a water sample
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| BOD | biochemical oxygen demand, the amount of oxygen consumed as a result of the oxidation of dissolved organic matter in the sample
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| TOC | total organic carbon, used to characterize the dissolved and suspended organic matter in raw water
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| Alkalinity | a measure of the ability of a water sample to act as a base by reacting with hydrogen ions
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| Hardness | the total concentration of the ions Ca2+ and Mg2+
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| DDT | dichlorodiphenyltrichloroethane,
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| DDE | Dichlorodiphenyldichloroethylene, formed from the breakdown of DDT
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| Dose-Response Curves |
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| Acid Mine Drainage | oxidation of iron pyrite fool's gold produces soluble iron(III)sulfate, FE2(SO4)3,sulfuric acid.Fe3+ ion is soluble in the highly acidic water,the pH rises a yellowish-brown precip. of Fe(OH)3 forms from Fe3+,discoloring water&smothering plant&animal life
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| Lake Stratification | Without mixing to provide dissolved oxygen, the lake bottom,lacking enough light for photosynthesis to occur,tends to have a very limited supply of oxygen during the summer.Respiration by animals and bacteria can deplete the dissolved oxygen at the botton
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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