| A | B |
| TRIBUTARY | A stream that runs into another stream |
| RIVER SYSTEM | A river and all of its tributarys |
| DRAINAGE BASIN | All the land that drains into a river |
| SEDIMENT | smalll particles of eroded rock |
| DIVIDE | High land tha seperates drainage basins. |
| GRADIENT | The steepness of the slope of a stream |
| DISCHARGE | Volume of water that passes a certian point in a given amount of time |
| HYDROLOGIST | Scientist who studies water and related issues. |
| CHANNEL | path through which a river flows |