| Cultural diffustion | spreads knowledge and skills from one culture to another |
| Culture hearth | early center of civilization |
| Culture region | area that includes different countries with certain traits in common |
| Developing country | works toward greater manufacturing and technology use |
| Ethnic Group | people who share common language, history, and place of origin |
| Federal system | government with power divided between national and state levels |
| Free trade | goods flowing easily between countries without trade barriers |
| Market economy | production determined by individuals and private groups |
| Migration | movement of people from place to place |
| Mixed economy | an economic system in which a governement supports and regulates free enterprise |
| Natural increase | growth rate of a population |
| Oligarchy | government in which a small group holds power |
| Population distribution | pattern of human settlement |
| Unitary system | government with all key powers at the national level |
| pollution | unclean elements in the air, water, or soil |
Drag corresponding items onto each other to make them disappear.
Start Game