| A | B |
|---|
| surface water | fresh water above ground |
| water shed | an entire area of land that is drained by a river |
| ground water | water that seeps down and is stored underground |
| aquifers | large amounts of water that is stored in rock formations |
| recharge zone | the area of land from which the ground water originates |
| desalinization | removing the salt from salt water |
| water pollution | the introduction of chemical, physical, or biological material into water that degrades the quality of the water and affects the organisms that drink it and live in it |
| point pollution | pollution that is discharger form a single source |
| nonpoint pollution | pollution that comes from many sources rather than from a single specific site |
| bioaccumulation | the amount of toxin that is passd on to the next "eater" |
| artificial eutrophication | eutrophication that is caused by humans |
| thermal pollution | excessive amounts of heated water added to a body of water |
| dam | a structure built across a river or stream that prevents most water from traveling downstream |
| pathogens | disease-causing organisms |
| algal blooms | large mats of algae that float on water |
| ecosystem | all living organisms in a certain area as well as thier physical environment |
| MARPOL | international convention for the pervention of pollution from ships |
| acid precipitation | highly acidic rain, sleet, or snow that results from the release of oxides of sulfur and nitrogen |
| clean water act | passed by congress to restore and maintain the chemical, physical, and biological integrty of a nation's water |
| coliforms | bacteria tested when testing water quality |
| Mississippi river | longest river in the United States |
| icecaps | more than half of the world's water is frozen here |
| Colorado river | river that winds through the western U.S. |
| reservoir | water that builds up behind a dam |
| groundwater pollution | chemicals and pollutiants that seep in the ground |
