| A | B |
| erosion | The process by which water, ice, wind, or gravity moves weathered rock in soil. |
| mass movement | any one of several processes by which gravity moves sediment downhill. |
| deposition | Process in which sediment is laid down in new locations. |
| sediment | Earth materials deposited br erosion. |
| gravity | force that moves rock and other materials downhill |
| landslide | most destructive kind of mass movement |
| mudflow | rapid downhill movement of a mixture of water, rock and soil |
| slump | a mass of rock suddenly slips down a slope |
| creep | the very slow downhill movement of rock and soil |