Chapter 1 Vocab 13th

Pangaea - The theory that the continents used to be together in one megacontinent. Then the tectonic plates slowly drifted apart.
Land bridge - The theory that during the Ice Age of about 30,000 years ago, enough water froze to lower the sea level so Asia and North America were connected. The ideas is that the first people to North America walked across this "bridge".

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Iroquois League - Five New York area Indian tribes united in a confederation. They kept their independence, but got together in times of war.

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