| A | B |
|---|
| Topography | The shape of the land. |
| Elevation | The height above sea level of an point on Earth's surface. |
| Relief | The difference in elevation between the highest and lowest parts of an area. |
| Landform | A feature of topography, such as a hill or valley, formed by the processes that shape Earth's surface. |
| Plain | A landform made up of nearly flat or gently rolling land with low relief. |
| Mountain | A landform with high elevation and high relief. |
| Mountain range | A group of mountains that are closely related in shape, structure, and age. |
| Plateau | A landform that has high elevation and a more less level surface. |
| Landform region | A large area of land where the topography is made up mainly of one type of landform. |
| Erosion | Process by which natural forces move weathered rock and soil from one place to another. |
| Sediment | Material moved by erosion. |
| Deposition | Occurs when agents of erosion, deposit, or lay down sedimet. |
| Gravity | Force that moves rock and other materials downhill. |
| Mass movement | Any one of several processes that move sediment downhill. |
| Landslides | Occurs when rock and soil slide quickly down a steep slope. |
| Mudflows | Rapid downhill movement of a mixture of water, rock, and soil. |
| Slump | A mass of rock and soil suddenly slips down a slope in one large mass. |
| Weathering | The chemical and physical processes that break down rock at Earth's surface. |
