| A | B |
|---|
| base | the bottom of a mountain or other landform |
| contour line | a line on a topographic map that connects points that have the same elevation or height |
| profile | side view or cross section of a landform |
| elevation | the vertical distance or height above sea level |
| intermittent stream | a stream that has water flowing in it only during certain times of the year |
| bench mark | surveyor's marker placed permanently in the ground at a known position and elevation |
| perennial stream | a stream that always has water flowing in it |
| sea level | a line separating the land and oceans; zero elevation |
| peak | the highest point or top of a mountain |
| contour interval | distance in elevation between contour lines |
| topographic map | a map that uses contour lines to show the shape and elevation of the land |
