Across
- 1. Exploiting domesticated animals to live
- 4. A major, ancient Sumerian city
- 5. Populated society with complex characteristics
- 7. World's first writing system; Mesopotamian
- 8. A small, settled community
- 9. Humans breeding to cultivate characteristics
- 12. Large structures in agrarian civilizations
- 21. Groups maintaining leadership over societies
- 22. Exploiting domesticated animals to live
- 23. Study of past events
- 24. Heavily-populated, regionally organized society
- 25. Mesopotamian site of agrarian civilizations
Down
- 2. Large society relying on farming
- 3. Study of Earth's geological features
- 6. Control of water for agriculture
- 10. Taming organisms with artificial selection
- 11. Wild maize; ancestor of corn
- 13. Region of the oldest civilizations
- 14. Food overproduction; developed specialized positions
- 15. One territory occupied by another
- 16. Cold time period on earth
- 17. Large social and trade center
- 18. A major, ancient Sumerian city
- 19. Living in a single place
- 20. Time period centered on agriculture