| A | B |
| conquer | To take over |
| Code of Hammurabi | A collection of laws created by a Babylonian leader |
| empire | A conquered land governed by one ruler |
| taxation | People have to pay taxes to support the government |
| emperor | The ruler of an empire |
| equal jusrtice | Fair treatment under the law |
| irrigation | Ways to move water to dry areas |
| tributary | Branch of a river |
| plateau | High, flat area of land |
| urban | City |
| silt | Rich mixture of soil and pieces of rock that helps to make soil fertile |
| alluvial plain | Low, flat land formed from silt deposited by rivers |
| drought | Long periods of time with little or no rain |