| A | B |
| decade | 10 years |
| century | 100 years |
| continuity | continuing without changing |
| Great Chicago Fire | a cow knocked a lantern causing a thousand homes and businesses |
| millennium | 1000 tears |
| time line | diagram that shows when nd in what order events took place |
| inventions | things that are made the first time |
| George Stephenson | "the father of the railway" |
| engineer | design ways to build and make things |
| William Jenney | designed the first metal-frame skyscraper |
| Elisha Otis | designed the first elevator that carried people |
| rights | freedom |
| vote | to make a choice that gets counted |
| suffrage | right to vote |
| slogan | short sayings |
| equality | equal treatment |
| civil rights | right to be treated equally |
| Dr. Martin L. King | a person that believed everyone should be treated equally |
| primary source | a record made by people who saw or took part in an event |
| secondary source | a record of an event that was made by someone that wasn't there |