| A | B |
| River | a large flowing body of water |
| Meander | winding path of a river |
| Tributary | a river that flows into a larger river |
| Headwaters | place where the river begins |
| Delta | land and rocks at the mouth of a river |
| Mouth | where the river enters the ocean |
| Erosion | natural wearing away of the earth |
| Flood plain | place that would flood easily |