| A | B |
| gap | a place between mountains |
| pioneer | an early settler of an area |
| consequence | what happens because of an action |
| impressment | the taking of workers against their will |
| national anthem | the official song of a country |
| nationalism | pride in one's country |
| assimilated | adopted |
| dictator | a leader who has complete control of a government |
| annex | an addition |
| ford | to cross |
| manifest destiny | the idea that the United States was meant to stretch from the Atlantic Ocean to the Pacific Ocean |
| cession | something given up |
| gold rush | a sudden rush of people to an are where gold has been found |
| forty-niner | a gold seeker who arrived in California in 1849 |
| canal | a human-made waterway that connects bodies of water |
| lock | a part of a canal in which the water level can be raised or lowered to bring ships to the level of the next part of the canal |
| locomotive | a railroad engine |
| Industrial Revolution | the period of time during the 1800's when machines took the place of hand tools to manufacture goods |
| cotton gin | a machine that could quickly remove seeds from cotton |
| interchangeable parts | parts that can be made exactly alike by machines |