1. What Migration Theory is being described here? 2. Describe the Historical Circumstances of this time period.
3. What is the Main Idea of this document?
4. Were the 1st humans pushed or pulled to the Americas according to this document?
Between 10,000 and 100,000 years ago, much of the world was covered by glaciers or thick sheets of ice. As more and more of the world’s water froze, the level of the oceans dropped. Areas that once were covered by shallow water became dry land. One of these areas was between Asia and North America. It became a bridge of land…Many scientists believe that people first came to North America between 20,000 and 30,000 years ago. They were hunters, possibly hunting prehistoric mammals such as the wooly mammoth.