| A | B |
|---|
| Coastal Plain | broad lowland providing many excellent harbors |
| Appalachian Highlands | oldest mountain range in North America, eroded |
| Canadian Shield | olest rock formations, hundreds of glacier carved lakes |
| Great Plains | grasslands, flat land that gradually increases in elevation westward |
| Interior Lowlands | grassy hills, many rivers, broad river valleys |
| Rocky Mountains | stretch from Alaska to Mexico, contains the Continental Divide |
| Basin and Range | contains Death Valley, elevations varies |
| Coastal Range | stretches from California to Canada, fertile valleys |
| Mississippi River | used for transporting farm and industrial products |
| Ohio River | gateway to the west |
| Columbia River | explored by Lewis and Clark |
| Colorado River | explored by the spanish |
| Rio Grande | forms border with Mexico |
| Atlantic Ocean | highway for explorers, early settlers, and immigrants |
| Gulf of Mexico | provided exploration routes to Mexico and other parts of America |
| basin | a bowl shaped land with higher ground all around |
| plateau | a broad area of high, mostly flat land |
| Continental Divide | an imaginary line that eparates rivers that flow into the Atlantic Ocean from those that flow into the Pacific Ocean |
| landform | a physical feature, such as a plain, mountain, or hill, on the earth's surface |
| Great Lakes | inland port cities in the Midwest grew here |
| mountain range | a group of connected mountains |
