Across
- 2. Movement of people from one place to another
- 5. Practice of spreading ideas from one culture to another
- 7. Document that protects freedoms like speech and religion
- 8. Trade route connecting China to Europe
- 12. Civilization located between the Tigris and Euphrates Rivers
- 15. River important to Egyptian civilization
- 16. Goods sold to another country
- 17. First president of the United States
- 19. Roman structures used to carry water
- 20. Expansion of the United States westward
Down
- 1. Branch of government that interprets laws
- 3. Chinese philosopher who taught respect and order
- 4. Writing system used in Mesopotamia
- 6. The supreme law of the United States
- 9. System in which people elect leaders
- 10. Greek city-state known for military strength
- 11. War fought between the North and South
- 13. Greek city-state known for democracy
- 14. Economic system based on private ownership
- 18. Goods brought into a country