| Description | Invention |
|---|
| 1920; Also known as the cathode-ray tube invented by Vladimir Kosma Zworykin | |
| Created by Henry Ford who revolutionized the automobile industry by using an assembly line technique to make cars that workers could afford. First car with a combustion engine. | |
| 1920; Allowed for mass broadcasting, advertising and propaganda. Created by Ernst Alexanderson | |
| Allowed people to leave behind the comfort of their daily surroundings and participate in adventures, big industry; The Jazz Singer | |
| 1928; invented by scientist Sir Alexander Fleming. Became widely used after World War 1 | |
| 1920; created by a police office from Detroit named William Potts. He used red, green and amber lights and wire | |
| Allowed Americans to shift their attention toward leisure-time activities. Harsh supervision, skills to perform a job became narrower | |
| Allowed women to spend less time on food preparation, could buy more at the supermarket, keep food cold | |
| Before the 1920s, women inserted a flexible pipe in the exhaust of a vacuum cleaner when hair was wet before this invention came out | |
| Benjamin Holt built first crawling tractor, scraping blades were added to to it, LaPlant-Choate Manufacturing Company produced the first full one, knocks down buildings, homes | |
U.S. Presidents 
Ivy League 
Original 13 Colonies
