Across
- 3. four important ___________ arose in river valleys around the same time
- 5. ________ land is land that is good for growing crops
- 6. a silver-colored metal that is stronger than bronze
- 7. _____________ were created to better manage larger civilizations
Down
- 1. ________ class is a ranking of people in a society based upon their role, wealth, or job
- 2. _________ of bronze and iron made for better tools and weapons
- 4. the invention of __________ helped early civilizations succeed