Across
- 5. Muhammad ibn Musa al-Khwarizmi's mathematic concept
- 6. known for traditional medicines
- 7. the lunar calendar of african tribe
- 12. famous for the theory of evolution
- 15. Mineral that mayans used in weaving cloth
- 18. agricultural tool invented by chinese
- 20. they are known for manufacturing iron
- 23. by-product of cacao that aztecs use
- 24. used in planning their activities, rituals and planting season
- 27. they have three types of calendar
- 29. one of the reasons India's known for
Down
- 1. Author of De revolutionibus orbium coelestium
- 2. Charles Darwin's famous work
- 3. the founder of psychoanalysis
- 4. use to measure length to a high degree of accuracy
- 8. the empire that has paved stone roads
- 9. other medical discovery of Egypt
- 10. result from the experiment of taoist monks that wanted to create a elixir of life
- 11. medication that the aztec use to prevent spasms
- 13. traditional medicine practice by the chinese
- 14. knowledge that traced to indus valley
- 16. term that algebra derived from
- 17. light narrow boat used for travelling
- 19. medical discovery of Egypt
- 21. they implemented the mandatory education
- 22. built hydraulics systems with sophisticated waterways to supply water
- 23. Aztec's tribute to their gods
- 25. Aztec's agricultural technology that they use in farming
- 26. the most important invention of chinese
- 28. a knotted rope that keep records