| Term | Definition |
| Skyscrapers | Tall Buildings |
| Petroleum | Oil |
| Free Enterprise | An economic system in which people are free to start and run their own businesses. |
| Transcontinental Railroad | Railroad that crossed US from Atlantic to Pacific Ocean. |
| Settlement House | A community center where people could learn new skills and get food and medical care. |
| Advertisement | A public announcement that tells people about a product or opportunity. |
| Hull House | Settlement House in Chicago that became a model for other settlement houses. |
| Strike | Workers refuse to work until employers meet their demands. |
| Tenements | Poorly built apartment buildings. |
| Labor Union | Group of workers who join together to improve their working conditions. |
| Collective Bargaining | Allows employers and workers to discuss and agree on working conditions.s. |
| Regulations | Government passed controls to limit immigration. |
| Chinese Exclusion Act | Kept out all new Chinese workers. Stopped any Chinese workers from coming to US for 10 years. |
| Angel Island | Where many Asian immigrants entered the US. |
| Ellis Island | In New York harbor. Immigrants were examined before being allowed into the country. |
| Homestead Strike | Violent strike that took place at steel mill in Pennsylvania. |
| The Great Migration | 500,000 African Americans moved from South to North looking for jobs. |
| AFL | American Federation of Labor. A group of different unions that banded together in one large union. |
| Promontory, Utah | Place where 2 lines of track from West and East met. A golden spike was driven in place, linking the 2 lines. |
| Sierra Nevada | Rugged mountains in the West. |
| Pacific Railroad Act | Plan to build the Transcontinental Railroad. |
| Sharecroppers | What many African Americans who stayed in the South did. |
| Collective Bargaining | Allowed employers and workers discuss working conditions. |