| A | B |
|---|
| Rocky Mountains | largest mountain range in the United States |
| interdependent | depending on each other |
| national parks | places set aside by the government for recreation and to protect landscapes |
| Interior West Region | a major economic region bordering the Rocky Mountains |
| Midwest Region | a major economic region bordering the Great Lakes |
| Pacific Region | a major economic region bordering the Pacific coast |
| South Region | a major economic region bordering the Gulf of Mexico and Atlantic coast |
| St. Lawrence Seaway | waterway that links the Great Lakes to the Atlantic Ocean |
| Great Salt Lake | large body of water in the Great Basin |
| St. Louis | important Midwest shipping and transportation center |
| Northeast | a major economic region along the Atlantic coast |
| multicultural | having more than one culture |
| Sierra Nevada Mountains | mountain range along the Pacific coast |
| Interior Plains | formed by the Central Lowlands and the Great Plains |
| Atlantic Coastal Plain | a broad lowland along the coast of the Atlantic |
| Gulf Coastal Plain | a broad lowland along the Gulf of Mexico |
| Hawaiian Islands | islands in the Pacific Ocean |
| Sunbelt | fastest growing areas in the south and southwest |
| Great Lakes | five large inland waterways in the Midwest |
| Gulf of Mexico | large body of water bordering the south |
