| A | B |
|---|
| decade | ten years |
| century | 100 years |
| continuity | continuing without changing |
| millennium | 1,000 years |
| inventions | things that are made for the first time |
| engineers | design ways to build and make things |
| vote | to make a choice that gets counted |
| civil rights | right to be treated equally |
| primary source | record made by people who saw or took part in the orginal event ( ie. speech, journal, AUTObiography) |
| secondary source | a record of an event made by a person who was not there ( news report, encyclopedia article, BIOgraphy) |
| assembly line | each worker adds one kind of part to a product as it passes on a moving belt |
