| A | B |
|---|
| aquatic | Living in water. |
| atmosphere | The gaseous envelope surrounding the earth |
| clarity | Clearness of appearance |
| condensation | The process of turning a vapor into a liquid |
| confluence | The point where two streams meet. |
| contaminant | An undesirable substance that is present, but is not intentionally added. |
| evaporation | The changing of a liquid to a gas. |
| groundwater | Water within the earth that supplies wells and springs. |
| hydroelectric | Generating electricity byconversion of the energy of running water |
| infiltration | The seepage of water into soil or rock |
| peak | The pointed top of a mountain or ridge |
| percolation | The downward movement of water through the soil in response to the pull of gravity |
| Point source pollution | Pollution that occurs from a single source. |
| freezing | In relation to water, changing from a liquid to a solid. |
| Precipitation | The amount of water, hail, sleet, snow, or other moisture received from clouds |
| ridge | Any broad or narrow, crested, elongated land feature that rises above or separates lowlands, plains, or valley basins. |
| runoff | The total stream discharge o fwater, including both surface and subsurface flow |
| topography | The shape of the ground surface as determined by such major features as hills, mountains, or large plains. |
| transpiration | The passage of water through a plant from the roots through the vascular system to the atmosphere. |
| turbidity | Cloudiness of water caused by the presence of colloidal matter or other finely divided suspended matter. |
