| A | B |
|---|
| Surface water | fresh water that is above ground in lakes, ponds, rivers, and streams |
| Watershed | an entire area of land that is drained by a river |
| Groundwater | water that seeps down into the soil and stored underground water |
| Aquifers | large amounts of groundwater that is stored in underground rock formations |
| Recharge zone | the area of land from which the groundwater originates |
| Water Pollution | the introduction of chemical, physical, or biological material into water that degrades the quality of the water and effects the organisms that live and drink from it |
| Point Pollution | pollution that is discharged from a single source, such as a factory |
| Nonpoint Pollution | pollution that comes from many sources rather than one |
| Euthophication | certain nutrients in bodies of water increase algae growth |
| Thermal Pollution | when excessive amounts of heat are added to a body of water |
