| A | B |
|---|
| erosion | The process by which water, wind, or ice moves particles of rock or soil. |
| sediment | small, solid pieces of material that come from rocks or organisms. |
| deposition | Process in which sediment is laid down in new locations. |
| gravity | A force that moves rocks and other materials downhill. |
| mass movement | Any one of several processes by which gravity moves sediment downhill. |
| runoff | Water that flows over the ground surface rather than soaking into the ground. |
| rill | A tiny groove in soil made by flowing water. |
| gully | A large channel in soil formed by erosion. |
| stream | A channel through which water is continually flowing downhill. |
| energy | The ability to do work or cause change. |
| flood plain | Wide valley through which a river flows. |
| meander | A looplike bend in the course of a river. |
| oxbow lake | A meander cut off from a river. |
| alluvial fan | A wide, sloping deposit of sediment formed where a stream leaves a mountain range. |
| delta | A landform made of sediment that is deposited were a river flows into an ocean or lake. |
| load | The amount of sediment that a river of stream carries. |
| headland | A part of the shore that sticks out into the ocean. |
| beach | Wave-washed sediment along a coast. |
| longshore drift | The movement of water and sediment down a beach caused by waves coming in to shore at an angle. |
| spit | A beach formed by longshore drift that projects like a finger out into the water. |
| sand dune | A deposit of wind-blown sand. |
| deflation | Wind erosion that removes surface materials. |
| loess | A wind-formed deposit made of fine particles of clay and silt. |
| glacier | A large mass of moving ice and snow on land. |
| continental glacier | A glacier that covers much of a continent of large island. |
| ice age | Times in the past when continental glaciers covered large parts of Earth's surface. |
| valley glacier | A long, narrow glacier that forms when snow and ice build up in a mountain valley. |
| plucking | The process by which a glacier picks up rocks as it flows over the land. |
| till | The sediments deposited directly by a glacier. |
| moraine | A ridge formed by the till deposited at the edge of a glacier. |
| kettle | A small depression that forms when a chunk of ice is left in glacial till. |
