| A | B |
|---|
| Alluvial soil | Extremely fertile soil deposited by rivers or streams |
| Basin | Lower area of land surrounded by mountains |
| Colorado River | River used for both irrigation and to produce electricity |
| Fall line | Point where rivers flow from hard rock to soft rock of coastal plain |
| Grand Banks | One of the most famous fishing areas of in the world |
| Hawaiian Islands | Region of the United States that lies completely within the tropics |
| Hot spot | A place where magma wells up to the surface from Earth’s mantle |
| Lichens | Small plants that consist of algae and fungi |
| Mississippi River | A river that deposits huge amounts of sediment into the Gulf of Mexico |
| Natural hazards | Events in the physical environment that can destroy human life and property |
| Piedmont | Area at or near the foot of a mountain range |
| St. Lawrence River | River that connects the Great Lakes to the Atlantic Ocean |
| Arable | land fit for growing crops |
| Bilingual | able to speak two languages |
| Chicago | third-largest city in the United States |
| Colonies | territory controlled by people from a foreign land |
| Gentrification | restoration of rundown urban residential areas |
| Megalopolis | group of cities that have grown in to one large, built-up area |
| NAFTA | trade agreement between the U.S., Canada and Mexico |
| Plantations | large farms that produce one major crop |
| Seattle | Pacific Coast city where many software companies are located and an important trading port with Asia |
| Superpower | large powerful country |
| Textiles | cloth products |
| Trade deficit | when the value of a country’s imports exceeds the value of its exports |
