Prehistory

1. diffusion the spread of ideas, inventions, or other cultural elements from one society to another
7. member of a group whose economy revolves around its herd of domesticated animals, with which the group periodically moves to find new grazing land
8. a biological process in which the physical characteristics of wild plants and animals change as a result of human intervention
11. involving or linking two or more regions
12. a ranking of groups of people according to their importance, status, or power
14. a political unit consisting of an independent city and the lands surrounding it
15. new stone age
16. a highly organized and complex society
17. a human who subsists by hunting wild animals and gathering wild plants

2. a system of government in which the people rule through representatives who govern according to law
3. democracy rule by the people, carried out through direct participation in government
4. settled; nonmigratory
5. old stone age
6. monarch a hereditary ruler whose power is unlimited
9. a series of rulers who come from the same family
10. the shared beliefs, practices, and traditions of a group
13. a large political unit in which a number of different lands or peoples are governed by a single ruler