| A | B |
| Alaska | Gold was discovered in this U.S. territory |
| Hawaii | Missionaries and sugar plantation owners controlled the land in this U.S. territory |
| Puerto Rico and Guam | Present day U.S. territory |
| Teddy Roosevelt | Thought world events affected the United State. He walked softly and carried a big stick. |
| Panama Canal | Shortcut between Atlantic and Pacific |
| Progressives | They wanted to improve government and people's lives. |
| Square Deal | Teddy Roosevelt's progressive reforms |
| Merit System | People who get government jobs must be qualified for the job. |
| National Urban League | Formed to help African-Americans in cities find jobs and homes. |
| Reason U.S. entered WWI | American ships sunk by u-boats |
| Poison Gas | Most frightening new WWI weapon. |
| Women's contribution to WWI | Did the jobs of men who went off to war. |
| War Industries Board | Planned production of goods during WWI |
| Isolationism | Congress voted not to join the United Nations |
| Income tax voted in | Government spending increases |
| N.A.A.C.P | Helped African-American citizens to gain greater rights. |
| Prohibition of alcoholic drinks | This ammendment was a failure. |
| League of Nations | This group of countries working together failed when the U.S. did not join. |
| Allied Powers | Russia, France, Britian, Italy |
| Central Powers | Germany, Austria-Hungry, Ottoman Empire, Bulgaria |
| 16th Ammendment 1913 | Federal Income Tax |
| 17th Ammendment 1913 | Voters of each state elect their senators. |
| 18th Ammendment 1919 | Outlawed all alcoholic drinks (It was later repealed.) |
| 19th Ammendment 1920 | Women can vote. |
| Interstate Commerce Commission | Set rates on railroads |
| Pure Food and Drug Act | Monitors quality of food and drugs |
| Meat Inspection Act | Government inspectors checked the quality of meat. |
| Imperialism | Get more land through purchase or war. |
| Isthmus | A narrow strip of land between two large land masses. |
| Seige | A very long attack. |