| A | B |
| social class | a group that is made up of people with a similar background, wealth, and way of living |
| surplus | more of a thing or product than is needed |
| civilization | a society that has cities, a central government, and specialized workers |
| artisan | a worker skilled in creating a product |
| irrigation | supplying land with water through a network of canals |
| oral tradition | stories passed down through generations by word of mouth |
| prehistory | period of time before written records |
| archaelolgist | scientist who examines artifacts to learn about past people and cultures |
| history | the written and other recorded events of people |
| nomad | a person who has no single settled home |
| fertile | land or soil that contains substances plants need in order to grow well |
| domesticate | to tame animals and raise them to be used by humans |
| The Iceman of the Alps | one of the oldest and best-preserved bodies ever found;discovered in 1991;believed to have lived about 5000 years ago |