River Valley Civilizations

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Across
  1. 3. extra
  2. 5. mathematics used in surveying
  3. 6. way of life
  4. 7. bowl-shaped hole
  5. 8. group of states under one ruler
  6. 11. Sumerian writing
  7. 13. farm tool
  8. 14. passed down from parent to child
  9. 16. inventor of the wheel
  10. 20. preserving the bodies of the dead
  11. 21. overflowing of river banks
  12. 22. Sumerian temple
  13. 23. tamed
  14. 25. small group
  15. 26. fan-shaped area of fertile land
Down
  1. 1. type of paper
  2. 2. number of people
  3. 4. improvement
  4. 9. before the invention of writing
  5. 10. skilled worker
  6. 12. New stone age
  7. 13. tombs for the pharaohs
  8. 15. machine for lifting water
  9. 17. to make one's way
  10. 18. period of power
  11. 19. waterfall
  12. 24. to measure land