9th grade social studies word puzzle

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Across
  1. 4. Leader of Islam
  2. 8. Medieval explorer
  3. 9. Buddhism
  4. 11. Chinese thinker
  5. 13. Founder of Buddhism
  6. 15. Famous Byzantine Emperor
  7. 16. First Emperor of Rome
  8. 17. First legal system
  9. 18. City-state
  10. 19. One of the three monotheistic religions
  11. 21. Indian Religion
Down
  1. 1. Second great Indian Empire
  2. 2. Government system
  3. 3. Athenian thought
  4. 5. Famous Indian leader
  5. 6. Chinese philosophy
  6. 7. Middle Ages government system
  7. 10. Empire of India
  8. 12. Jerusalem
  9. 14. Growing crops
  10. 20. Indian weather