| A | B |
|---|
| topography | The variation of land surface elevations caused by different landforms in a region. |
| isostasy | The balance between the downward weights of rock, water, ice, and the upward force exerted by the mantle. |
| landform | A shape or structure on the earth's surface, such as a mountain, valley, beach, plain, dessert, plateau, or lake. |
| orngeny | Tectonic processes of building mountains and the landforms that result from mountain building. |
| mountain | A natural elevation of the earths surface rising to a summit. |
| hill | A natural elevation of the earth's surface rising to a summit. |
| elevation | Height of a point on the earth's surface above sea level; the height of a mountain peak. |
| actual height | Height of a mountain's summit above its base, considered to be the mountain's bottom |
| relief | The relative difference in height between the highest and lowest elevations within a specific region. |
| mountain range | A series of mountain peaks in the same geographical area. |
| mountain system | A group of mountain ranges connected over a large area. |
| fold mountain | Mountain formed from folded rock strata. |
| errosional mountain | Mountain landform carved out by extensive erosion, usually from a plateau ; called a residual mountain. |
| depositional mountain | Mountain landform resulting from the deposition of volcanic materials or sediments by ice, water, or wind. |
