| A | B |
|---|
| archaeologists | Scientists who study past cultures by analyzing human remains and artifacts |
| artifacts | Objects made or altered by human beings |
| stratigraphy | Branch of geology based on the idea that artifacts found in deeper layers of the earth are ususally older than those above them |
| radiocarbon dating | Process used to determine the approximate age of artifacts made of materials such as wood or animal bone |
| Homo sapiens | " Thinking man," modern humans who began to appear in Africa by about 200,000 B.C. |
| nomads | People who moved constantly in search of food and water |
| culture | Collective characteristics such as art, literature,and sense of identity that set one people apart from others |
| domestication | Purposeful adaptation of plants and animals for the benefit of humans |
| pastoralism | Dependency on animals for milk and meat as a primary food source |
| Agricultural Revolution | Shift from food gathering to food producing |
| civilization | Complex society that has several basic elements, production of surplus food, large towns or cities, and divisions of labor |
