| A | B |
| transcontinental railroad | one that crossed the entire country |
| free enterprise | economic system in which people are free to run their own business |
| petroleum | oil |
| entrepreneur | a person who sets up and runs a business |
| skyscrapers | very tall buildings |
| advertisement | public announcement that tells people about a product or opportunity |
| tenements | crowded, poorly build apartment buildings |
| regulations | controls |
| settlement house | community center where people could learn a new skill and get food and medical care |
| labor union | a group of workers who join together to improve working conditions |
| strike | workers refuse to work until employers meet their demands |
| collective bargaining | allows employers and workers to discuss and agree on working conditions |