| A | B |
|---|
| urban | city |
| plateau | high, flat area of land |
| alluvial plain | lov, flat land fromed from fine soils deposited by rivers |
| tributaries | branches of a river |
| silt | a rich mixtures of bits of rick and soil |
| drought | long periods of time with little or no rain |
| irrigation | the use of connected ditches, canals, dams and dikes to move water to dry areas |
| civilization | a centralized society with developed forms of religion, government, education, a surplus of food, and division of labor |
| technology | skills and knowledge to make products or meet goals |
| ziggurat | a huge mud brick temple |
| government | an organized system that groups use to make laws and decisions |
| city-state | an independent city and the farmlands around it |
| monarchy | government of a city-state in which one person has complete authority to rule in peacetime and lead soldiers in wartime |
| authority | the right |
| surplus | extra supply |
| merchants | people who buy and sell goods for a living |
| social classes | groups in society with different levels of importance |
| scribe | a person who wrote things for others |
| innovations | new ways of doing things |
