| A | B |
|---|
| weathering | the natural process by which atmospheric and environmental agents, such as wind, rain and temperature changes, disintegrate and decompose rocks |
| chemical weathering | the chemical breakdown and decomposition of rocks by natural processes in the environment |
| physical weathering | the mechanical breakdown of rocks into smaller pieces that is caused by natural processes and that does not change the chemical composition of the rock material |
| erosion | the process by which wind, water, ice, or gravity transports soil and sediment from one location to another |
| deposition | in geology, the process in which material is laid down |
| topography | the size and shape of the land surface features of a region, including its relief |
| relief | the difference between the highest and lowest elevations in a given area: the variations in elevation of land surface |
| scale | the relationship between the measurements on a model, map, or diagram and the actual measurement or distance |
| topographic map | a map that shows the surface features of Earth |
| contour interval | the difference in elevation between one contour line and the next |
| slope | a measure of a slope of a line: the ratio of rise over run |
| contour line | a line that connects points of equal elevation on a map |
| index contour | on a map, a darker, heavier contour line that is usually every fifth line |
