Across
- 2. Irrigation systems crossed village boundaries so the Sumerians had to ______ with one another.
- 3. To defend themselves, the Sumerians built walls and moats around their ________.
- 6. The Sumerians progressed from living in small ________ villages to building large, walled city-states.
- 7. These _________ city-states often fought with one another.
Down
- 1. To control the water supply, Sumerians built a complete ________ system.
- 4. Food shortages has _____ settlers in Mesopotamia to move from the foothills down to the river valley.
- 5. In the foothills, farmers faced the problem of having either too much or too little _____.
- 6. A basic challenge for any group at this time was how to provide _____ / Water for itself.