| A | B |
|---|
| Diversity | variety |
| Irrigation | supplying land with water by using dams and ditches |
| Tribute | forced payment |
| Civilization | society in which a high level of art |
| Culture | the way of life of a people |
| Nomads | people with no permanent homes who move in search of food |
| Glaciers | vast slow moving masses of ice |
| Migration | movement of people from one region to another |
| Asia | ancient Americans passed over Beringia from here |
| Olmecs Aztecs Myans | civilizations that rose in Mesoamerica after agriculture developed |
| Populations and villages developed | when early people began growing crops |
| Archaeologists uncovered temples and art that showed | religion was important in some early civilizations |
| Calendars zero pyramids | achievements of early Mesoamerican civilizations |
| Irrigation systems | developed by people who lived in desert areas to grow crops |
| Built huge serpent mounds | the Adenas Hopewells Mississippians |
| Food supply | the main factor that affected the size of the Indian population in an area |
