The Earliest Americans

A land bridge out of glaciers that covers an area between ________, is believed to be where people first came to North America, possibly following the coast as they hunted prehistoric mammals.

• Siberia and Alaska

• China and Alaska

• South America and North America

• South America and Canada

Match the following

• civilization

• extra

• irrigation

• an advanced culture in which people have developed cities, science, and industries

• surplus

• this sheets of ice

• glaciers

• method of water crops by channeling water from rivers and streams

Some scientists think that people may first have crossed the arctic waters by boat and traveled southward along the Pacific coast. ​ (a)  

• coastal-route theory
• land-bridge theory

The believe that people first came to North America, possibly following the coast as they hunted prehistoric mammals crossing over the frozen Bering Strait. ​ (a)  

• land-bridge theory
• coastal-route theory

After larger animals began to disappear hunters lost their main source of food,. What did they do?

• Became farmers (agriculture begun)

• became gathers, searching for wild plants and small game (small animals)

• They became instinct

• They went back to Siberia.

The discovery of farming transformed life. No longer did families have to wander in search of food. In dry regions, farmers developed methods of ​ (a)   .

• irrigation
• surplus
• glacier
• civilization

Select all that apply.

Farmers also learned how to raise

• cattle

• pigs

• llamas

With a more dependable food supply, the population ​ (a)   more rapidly. Once Native Americans produces ​ (b)   food, they traded with others.

• grew
• decreased
• surplus
• civilization

The cities became centers of government and religious life. With the development of cities came the beginning of ​ (a)  

• civilization
• irrigation
• surplus

Match the following

• religion dominated their lives

• Incas

• Created the most accurate calendar.

• Aztecs

• the finest roads to be seen in the world

• Mayas