| A | B |
|---|
| Tribute | Payment made by a weaker power to a stronger power to obtain an assurance of peace and security |
| Mita | a labor tribute that required all able bodied citizens to work for the state a certain number of days |
| Altitude | vertical height of a place |
| Beringia | A land bridge that carried the first people from Asia to the Americas |
| Ice Age | a cold period, huge ice sheets spread outward from the polar regions |
| Maize | corn grown by early farmers and it became the most important crop |
| Olmec | Mesoamerica's first known civilization builders |
| Zapotec | a group of people after Olmec, developed an advanced society to the southwest |
| Quipu | an accounting device that used a set of knotted strings to record data |
| Terrace Farming | farming on a slope by creating flat step-like areas |
