| A | B |
| pioneer | a person who leads the way into new areas |
| Louisiana Purchase | the territory purchased from France in 1803 reaching from the Mississippi River to the Rocky Mountains and from the Gulf of Mexico to Canada |
| neutral | not taking sides |
| War Hawks | members of Congress who wanted to declare war on Britain |
| national anthem | a song of praise for a country |
| Battle of New Orleans | the last battle of the War of 1812, fought after a peace treaty had been signed |
| Star-Spangled Banner | the national anthem of the United States |
| Indian Removal Act | a law that allowed the President to remove Native Americans from their homelands |
| Trail of Tears | a forced march to Indian Territory on which many Native Americans died |
| Industrial Revolution | the change from making goods at home by hand to making them by machine in factories |
| cotton gin | a machine that removed the seeds from cotton |
| interchangeable parts | parts of a product built so they can be easily replaced |
| steam engine | an engine that is powered by the energy from steam |
| canal | a human-built waterway |
| investor | a person who uses money to buy or make something that will make a profit |
| lock | a water elevator that moved boats to a higher or lower level |
| gold rush | the sudden rush of people to an area where gold has been discovered |
| Forty-Niners | people who came to California in 1849 in search of gold |