The Early Americans

What environmental change allowed people to travel by land between Asia and North America?

• human adaptation to Arctic environments

• ice sheets blocking sea routes

• the formation of ice sheets on land

• the melting of ice sheets on land

Which of the following promoted the spread of permanent settlements in the Americas?

• the melting of glaciers

• the development of farming

• the rise of civilization

• the spread of people across a land bridge.

Which was the main way the Incas modified their environment to grow more food?

• by building stone walls

• by building terraces

• by cutting down forests

• by irrigating fields

How were the Olmecs able to support a civilization and cities?

• by implementing heavy taxes to raise public funds for each community

• by constructing residential dwellings for the growing populations in its cities

• by cultivating a surplus of food that could feed its large population

• by developing a system of roadways to connect different communities

Which represents an Aztec adaptation to their environment?

• farming in terraces

• a system of causeways

• a surplus of farmed crops

• an accurate 365-day calendar