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

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

• surplus

• this sheets of ice

• irrigation

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

• glaciers

• extra

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

• the finest roads to be seen in the world

• Mayas

• Created the most accurate calendar.

• Aztecs

• religion dominated their lives

• Incas