| A | B |
|---|
| base | the bottom of a mountain |
| bench mark | surveyor's marker placed at a known elevation and position |
| contour interval | distance in elevation between contour lines |
| contour line | a line on a topographic map that connects points that have the same elevation |
| elevation | vertical distance above sea level |
| intermittent stream | a stream that has water flowing in it ONLY during certain times of year |
| peak | the highest point on a mountain |
| perennial stream | a stream that ALWAYS has water flowing in it |
| profile | side view of a landform |
| sea level | a line separating the land and the oceans |
| topographic map | a map that uses contour lines to show the shape and elevation of land |
| control | a standard against which other conditions can be compared in a science experiment |
| variable | a factor of a science experiment that can be changed |
| erosion | the wearing away and movement of earth material by water, wind or ice |
| deposition | the process by which eroded earth materials settle in another place |
| mountain | high, uplifted area with steep slopes |
| valley | a low area between hills and mountains where a river often flows |
| plain | nearly level area that has been eroded or where material has been deposited |
| delta | a fan shaped deposit at the mouth of a river |
