Across
- 4. a means of supplying land with water
- 7. an area in southern Mesopotamia where cities first appeared
- 9. a structure built across a river to control the river's flow
- 10. materials found in nature
- 11. A complex society with permanent structures, a social hierarchy, a form of government, and a written language.
Down
- 1. a large area of flat land with few trees
- 2. fine particles of rock
- 3. A city with political and economic control over the surrounding countryside
- 5. A rectangular tiered temple
- 6. a wall of earth built to prevent a river from flooding its banks
- 8. in ancient times, the geographic area located between the Tigris and Euphrates rivers