| A | B |
| Ancient Egypt | an early river valley civilization established on the Nile River |
| Babylonian Empire | empire in Mesopotamia; Hammurabi was one of its rulers |
| civilization | an advanced society as judged by such things as having a system of government and laws, using a written language, and keeping written records |
| Code of Hammurabi | a law code enacted by Hammurabi, the king of Babylonia around 1772 BC |
| Indus River Valley Civilization | an early river valley civilization located in the present-day countries of Pakistan, Afghanistan, and India that included the cities Mohenjo-daro and Harappa |
| irrigation | the act of supplying water to land or crops- FROM A RIVER |
| Mesopotamia | a region in the Middle East between the Tigris and Euphrates Rivers |
| river valley | the area of land nearby and parallel to a river |
| Shang China | an early river valley civilization in China established on the Huang He (Yellow) River |
| social class | a grouping of people in a society based usually based on wealth, religion, ethnicity, or other factors |
| terrace farming | the technique of creating flat farmland on a hill by digging into the slope, leveling off a horizontal area |
| Tigris and Euphrates Rivers | rivers in the Middle East that form the region called Mesopotamia where the first civilizations were established |