Sumerian Puzzler

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Across
  1. 4. The name of the Sumerian writing system.
  2. 8. Developed the first system for this
  3. 10. A Sumerian trade item.
  4. 11. Sumerians wrote on this.
  5. 12. Happened annually making the soil very rich
Down
  1. 1. Mesopotamia is north of this body of water
  2. 2. The other river.
  3. 3. A huge central building which was the center of the Sumerian city-state.
  4. 5. Describes the land of Sumer before canals.
  5. 6. One of two rivers that defined Mesopotamia.
  6. 7. To direct water where it is needed
  7. 9. It surrounds a Sumerian city.