| A | B |
|---|
| The theory of how first Americans arrived | walked from Siberia to Alaska across the Bering Strait land bridge. |
| The first Americans were . . . | ancestors of Native Americans who came to North America thousands of years ago |
| Reasons why explorers and settlers came to North America | spread Christianity, find gold and riches, and claim new land |
| Ways that new territory was added to the United States | Florida was purchased from Spain, purchased Louisiana territory from the French, Britain gave up the Oregon territory |
| How did the U.S. expand it's territory from the Atlantic to the Pacific Oceans? | Signing treaties, buying lands, and fighting wars |
| Purpose of Christopher Columbus' first voyage to North America | to find a short cut by sea to Asia |
| Effects of immigration | names of places in U.S., growth of American culture, new invention, and more tolerance |
| What shaped Native American culture of the different tribes | the environment and its natural resources |
