| A | B |
|---|
| Erosion | The process by which water, ice, wind, or gravity moves fragments of rock and soil. |
| Deposition | The process by which sediment settles out of the water or wind that is carrying it |
| Runoff | Water that flows over the ground surface rather than soaking into the ground |
| River | A large stream. |
| Tributary | A stream that flows into a larger stream. |
| Stream | A channel through which water is continually flowing downhill. |
| Flood Plain | A broad, flat valley through which a river flows. |
| Divide | A ridge of land that separates one drainage basin or watershed from another. |
| Drainage Basin | The land area from which a river and its tributaries collect their water. |
| Alluvial Fan | A wide, sloping deposit of sediment formed where a stream leaves a mountain range. |
| Meander | A looping curve formed in a river as it winds through its flood plain. |
| Delta | A landform made of sediment that is deposited where a river flows into an ocean or lake. |
| Gully | A large channel in soil formed by erosion. |
| Oxbow Lake | The crescent-shaped, cutoff body of water that remains after a river carves a new channel. |
| Groundwater | Water that fills the cracks and proes in underground soil and rock layers. |
| Longshore Drift | The movement of water and sediment along a beach caused by waves coming into shore at an angle. |
| Beach | Wave-washed sediment along a coast. |
| Spit | A beach formed by longshore drift that projects like a finger out into the water. |
| Sand Dune | A deposit of wind-blown sand. |
