| A | B |
|---|
| archaeologist | a person who studies bones, tools, pottery, and other artifacts to learn how ancient people lived |
| glacier | a thick sheet of slowly moving ice |
| migrate | to move |
| agriculture | the process of growing crops and farming |
| Asia | where the first Americans came from |
| Pacific Ocean | The first Americans may have sailed on the ____. |
| Bering Strait | The first Americans may have walked across the ___. |
| herds of large animals | The first American may have followed ___. |
| Ice Age | During the ___ much of the world's water was frozen. |
| frozen | During the Ice Age much of the world's water was ___. |
| underwater | During the Ice Age land that had been ____ became visible. |
| visible | During the Ice Age land that had been underwater became ___. |
| Bering Strait | narrow strip of land between Russia and Alaska |
| large animals | As the Ice Age ended ___ died out. |
| smaller animals | As the Ice Age ended early people learned to hunt ____. |
| weapons | After the Ice Age the ___ became smaller. |
| bows and arrows | examples of weapons used after the Ice Age |
| melted | As the Ice Age ended, the ice ___. |
| filled the oceans with water | The melting ice ____. |
| boats | Early people used ___ to fish. |
| clams and oysters | Early people dug for ____. |
| edible roots | Early people learned to collect ____, nuts and berries. |
| berries | Early people learned to collect edible roots, nuts and ___. |
| nuts | Early people learned to collect edible roots, ___ and berries. |
| basket | Early people developed ___ weaving. |
| farming | At the end of the Ice Age ____ began. |
| villages | As farming began, permanent ___ were established. |
| extra food | Civilizations grew because of ____. |
