| A | B |
|---|
| Continental Divide | An imaginary line that runs north and south along the highest points of the Rocky Mts. Rivers flow west or east from this line. |
| Barrier | Something that blocks the way or makes it hard to move from place to place. |
| Wagon Train | a group of wagons, each pulled by horses, mules, or oxen. |
| Boomtown | A town that grew up quickly, almost overnight |
| Suffrage | The right to vote |
| Satellite | A hum,an made object that orbits the Earth |
| Timberline | On a mountain, the elevation above which the termperatures are too low for trees to grow. |
| Geyser | A spring that shoots stream and hot water into the air. |
| Public Land | land that is owned by the government. |
| Terrace | A flat "shelf" dug into a mountainside to make farming there possible. |
| Bartering | The trading of one kind of good or service for another without using money. |
