Mesopotamia Crossword Puzzle

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Across
  1. 3. man-made waterways
  2. 5. collection of kingdoms
  3. 7. water transport system
  4. 8. fertile soil "flood mud"
  5. 9. classes or ranks
Down
  1. 1. belief in many gods
  2. 2. design of buildings
  3. 4. extra
  4. 6. king or queen or emperor