Ancient Civilization review

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Across
  1. 1. River / The second river for Mesopotamia
  2. 3. River / The river for Mesopotamia
  3. 7. / Our first ancient civilization
  4. 12. / 2nd Chinese religion
  5. 14. System / The Social Structure in the Indus
  6. 15. River / The river for the Indus civilization
  7. 17. / What does the second letter in PEA stand for?
  8. 19. / The C in SPICE
  9. 21. Structure / The S in SPICE
  10. 23. / What does the third letter in PEA stand for?
  11. 24. / Every PEA starts with this
Down
  1. 2. with the environment / The I in SPICE
  2. 4. / The E in SPICE
  3. 5. / King in Egypt
  4. 6. / The P in SPICE
  5. 8. / Chinese religion
  6. 9. China / Our last ancient civilization
  7. 10. Civilizations / What have we been studying?
  8. 11. Egypt / Our second ancient civilization
  9. 13. / The acronym for how we determine the civilizations traits
  10. 16. River Valley / Our third ancient civilization
  11. 18. River / Ancient China's main river
  12. 20. / The Mesopotamian story
  13. 22. / What does the first letter in PEA stand for?