Chapter 2 - Early River Valley Civilizations 

Sumerians

________ were able to increase long- distance trade by exchanging surplus grain and other goods for those they required.

Ancient Egyptians

________ lived along the Nile from its mouth all the way into Africa's interior.

Clay

________ and wooden children's toys indicate a highly rich civilization that could afford to manufacture non- essential commodities.

Early Chinese cultures

________ were creating agrarian communities along the Huang He even before the Sumerians settled in southern Mesopotamia.

Indus Valley

The ________ was protected from invasion by the world's largest mountains to the north and a huge desert to the east.