| A | B |
|---|
| Canadian Shield Region | Horseshoe-shaped region which wraps around the Hudson Bay |
| Coastal Plain Region | Many excellent harbors and is located along the Atlantic Ocean and the Gulf of Mexico |
| Appalachian Mountain Region | Oldest mountain range in North America |
| Interior Lowlands Region | Rolling flatlands with many river valleys |
| Great Plains Region | Flat grasslands that gradually increase in elevation as the region nears the Rockys |
| Rocky Mountain Region | Contains the Continental Divide-the feature which determines directional flow of rivers |
| Basin and Range Region | Contains Death Valley, the lowest point in N. America |
| Coastal Range Region | Rugged Mountains located on the Pacific coast from California to Canada |
| Ohio River | "Gateway" to the west |
| Atlantic Ocean | "Highway" for explorers to the new world |
| Colorado River | Dark colored river explored by the Spanish |
| Columbia River | Clear, clean river explored by Lewis and Clark |
| Mississippi River | Major transportation artery which linked U.S. with other parts of the world |
| Columbia River | Explored by Lewis and Clark. Flows to the Pacific Ocean |
| Colorado River | Explored by Spanish. A dark colored river |
| Rio Grande | Forms the international boundary between Mexico and the United States |
| Great Lakes | Inland port cities grew along these lakes. |
| Australia | a continent that is an island |
| Eurasia | The land mass of Europe and Asia combined |
| Gulf of Mexico | Explored by French and Spanish |
