Who studies the past by digging up artifacts?

The land bridge theory says humans arrived in North America from what continent?

The Land Bridge Theory says humans came from Asia to North America about how many years ago?

What was found at a place called Cactus Hill, Virginia?

What did finding artifacts at Cactus Hill do to the Land Bridge Theory?

What river is near Cactus Hill, VA where artifacts were found?

What group lived in the Eastern Woodlands

What Native American culture lived in the Great Plains?

Northern Canada and Alaska was the Arctic home of what group of Native Americans?

The rainy climate of the Pacific Northwest was the home of what group of Native Americans

The Southwest is a hot and dry place. What group made their homes bordering cliffs in this hot and dry climate?

Name the shelter used by the Kwakiutl.