| A | B |
| Progressive Movement | Social reform movement in early 20th century |
| Muckraker | Writer who exposes wrong doing |
| Robert LaFollete | Progressive Wisconsin governor and senator |
| 17th Amendment | Amendment providing for senators to be elected directly |
| NAWSA | Founded in 1890 to help women win right to vote |
| Teddy Roosevelt | President from 1901 to 1909 |
| The Jungle | Novel by Upton Sinclair describing meat packing |
| Meat Inspection Act | Law reforming meatpacking conditions 1906 |
| Pure Food & Drug Act | Law to stop the sale of unclean food and drugs |
| NAACP | Founded in 1909 to work for racial equality |
| Imperialism | Practice of strong countries military power. |
| Yellow Journalism | News paper and magazine that exaggerate the news |
| U.S.S. Maine | U.S. ship that blew up in Cuba |
| Treaty of Paris | Ended Spanish war |
| Foraker Act | Ended military rule in Puerto Rico |
| Platt Amendment | Provisions in the Cuban constitution |
| Open Door Policy | US Policy of dealing with China in regards to trade |
| Panama Canal | Channel bulit across Central America |
| Roosevelt Corollary | 1904 extension of the Monroe doctrine |
| Dollar Diplomacy | The policy of intervening in other countries to protect us |
| Allies | one side in ww1- great Britain |
| Central Powers | one side in ww1- Germany |
| Archduke Ferdinand | young heir whose assassination triggered the war |
| Trench Warfare | fighting between fortified ditches |
| Lusitania | British passenger ship attacked and sunk by Germans |
| Selective Service Act | law requiring men to register for military service |
| Espionage & Sedition Act | laws that enacted harsh penalties against anyone opposing us |
| 14 Points | Wilson plan for world peace |
| League of Nations | An international peace-keeping organization |
| Treaty of Versailles | 1919 treaty that ended the war |