| A | B |
|---|
| watershed | area of land drained by a river. |
| surface area | fresh water above ground. |
| groundwater | water stored underground. |
| aquifers | large amounts of ground water. |
| recharge zone | area of land which groundwater originates. |
| desalization | process of removing salt from water. |
| water pollution | the introduction of chemical, physical, or biological material into water that degrades quality of water. |
| point pollution | pollution that can be seen and comes from a single source. |
| nonpoint pollution | pollution that comes from many different sources. |
| bioaccumulation | biomagnification |
| artificial eutrophication | eutrophication caused by humans. |
| thermal pollution | excessive amounts of heat added to water. |
| dam | a structure built across a river that presents water from moving. |
| Ogallala aquifer | holds about 4 quadrillion liters of water, it lies in the states of Wyoming, South Dakota, Nebraska, Colorado, Kansas, Oklahoma, New Mexico, and Texas. |
| Distillation | one method of distillation, heat is used to evaporate fresh water from salt water, leaving salt behind. |
| Reverse osmosis | pressure is used to push the water through a semipermeable membrane that will not permit to salts to pass. |
| water conservation | ways to save water. |
| pathogens | disease causing organisms such as bacteria. |
| organic matter | biodegradable remains of animals and plants, including feces. Primarily from nonpoint resources. |
| organic chemicals | pesticides, fertilizers, plastics, detergents, gasoline, and oil, and other, materials made from fossil feuls such as petroleum. |
| inorganic chemicals | acid, salts, toxic metals; from both point and nonpoint sources. |
| toxic chemicals | chemicals that are poisonous to living things, including heavy metals (lead, mercury, cadmium) and many industrial, and some household chemicals. |
| Physical Agents | heat and suspended solids such as soil. |
| Radioactive waste | from power plants or nuclear processing and defense facilities. |
| nonrenewable resource | resources that cannot be replaced. |
