| A | B |
| erosion | process by which natural forces move weathered rock or soil from one place to another |
| deposition | occurs where agents of erosion lay down sediment |
| mass movement | proceeses that move sediment downhill |
| gravity | the force that moves rock and other materials downhill |
| landslide | occurs when rock & soil slide quickly down a steep slope |
| mudflow | the rapid downhill movement of a mixture of water, rock & soil |
| slump | a mass of rock & soil suddenly slips down a slope |
| creep | the very slow downhill movement of rock & soil |
| glacier | a large mass of ice that moves slowly over land |
| valley glacier | a long, narrow glacier that forms when snow & ice build up high in a mountain valley |
| continental glacier | a glacier that covers much of a continent or large island |