| A | B |
| Land Bridge | The last Ice Age made the sea level drop revealing a land bridge between Asia and North America. |
| Bering Strait | The Bering Strait that now separates Alaska from Siberia was dry land during the last Ice Age. |
| Migration | It is theorized that hunter gatherers from Asia migrated across the land bridge to North America following food. |
| Migration from NE Asia | travelled by boat along the coastline to North and South America |
| Migration from SE Asia | travelled across the Pacific Island hopping |
| Migration from SW Europe | crossed the North Atlantic, passing by Iceland and Greenland |
| Western Native American Tribes | Zuni, Hopi, Pueblo |
| Pacific Coast Native American Tribes | Tlingit, Haida, Kwakiutls, Nootkas, Chinook, and Salish. |
| Great Plains Native American Tribes | Sioux |
| Far North Native American Tribes | Inuit and Aleut |