| A | B |
|---|
| Topography | the surface features of the Earth |
| Topographic Map | a map that shows shape and elevation |
| Sea Level | the elevation of the Earth at the ocean - usually 0 |
| Elevation | the distance of a point above or below sea level |
| Contour Line | a line that connects all points of equal elevation |
| Contour Interval | the difference in elevation between 2 contour lines |
| Profile | the side view of a part of the Earth |
| Hill | an area where elevation increases |
| Valley | an area where elevation chances slowly |
| Depression | an area where elevation decreases sharply (a hole) |
