| A | B |
|---|
| bedrock | solid rock underlying the surface of the earth |
| appalachians | poorest of the United States |
| lock | enclosed section of a canal in which a ship is raised or lowered |
| maritime | bordering on or related to the sea |
| Aqueduct | Large pipes that carry water from far away |
| Bayou | slow moving water from an inlet of a lake or river |
| Breadbasket | Another term or slang term for the Midwest |
| Fall line | Where the Appalachian Mountains and the Atlantic Coastal Plain meet and many waterfalls occur |
| Grain Elevator | Tall building equipped for loading, cleaning, mixing, and storing grain |
| Grain exchange | place where buyers and sellers deal for grain |
| growing season | average number of days between spring frost and fall frost |
| Humus | Dark colored organic material formed from the decayed remains of plants and animals |
| mangrove | tropical trees that grow in swampy coastal areas |
| megalopolis | when the edges of one major city comes into contact with another large city |
| sunbelt | area from the Carolinas to California that people from the North want to live |
| Transcontinental railroad | Transportation that spurred the growth of towns and cities |
| Tundra | dry treeless plain where only specialized plants and animals can grow |
| water wheels | way to convert water power into machine power was in the use of this |
