| A | B |
|---|
| isthmas | narrow strip of land |
| elevation | height above sea level |
| erosion | gradual wearing away of soil |
| weather | condition of earths atmoshpere at a given time and place |
| climate | average weather ofer a period of 20 to 30 years |
| precipitation | water that falls as rain, sleet, hail, or snow |
| altitude | height of the land above sea level |
| tributary | stream or river that flows into a larger river |
| Pacific coast | westernmost region of U.S. Features the Cascade and Sierra Nevada mts. |
| Intermountain region | East of the pacific coast, dry sandy deserts, deep canyons, high plataues and mountain peaks |
| Rocky Mountains | Places like Denver, Colorodo with the highest peaks in the us. Streaches from Alaska through wester U.S. |
| Interior Plains | between Rockies and and the Appalachian Mts. Large areas of flat land |
| Coastal Plains | Eastermost region of US. Slat lowland areas from Atlantic coast and Gulf coast to Appalachian Mts. |
| Appalachian Mountains | Run along eastern part of US. Pa is one of the Appalachian states. |
