Section 1
Early Humans Cross Land Bridge to America
Between 20,000-30,000 years ago, hunters from Asia likely crossed a land bridge created by glaciers to reach North America, gradually spreading throughout the Americas over thousands of years.
In this Grade 8 lesson from America: History of Our Nation, students examine how the first people may have migrated to the Americas from Asia, exploring both the land-bridge theory and the coastal-route theory. Students also learn how early hunters transitioned to farming through techniques like irrigation, which led to surplus food production and the growth of complex societies. The lesson concludes with an introduction to the civilizations of the Mayas, Aztecs, and Incas as examples of advanced Native American cultures.
Section 1
Early Humans Cross Land Bridge to America
Between 20,000-30,000 years ago, hunters from Asia likely crossed a land bridge created by glaciers to reach North America, gradually spreading throughout the Americas over thousands of years.
Section 2
Hunter-Gatherers Develop Farming Techniques
As large game animals disappeared, early Americans began growing food plants about 8,000 years ago. They developed irrigation methods and animal husbandry, leading to food surpluses, population growth, and trade.
Section 3
Mayas Build Advanced Cities and Scientific Knowledge
Between 250-900 CE, Mayas constructed magnificent cities with pyramids and temples. They developed written language, accurate calendars, and astronomy before mysteriously abandoning their cities around 900 CE.
Section 4
Aztecs Create Powerful Empire Around Tenochtitlan
Aztecs built their capital on lake islands, with floating crop platforms and stone roadways. Their empire controlled half of modern Mexico, but harsh rule created resentment among conquered peoples.
Section 5
Incas Connect Vast Empire Through Engineering
Incas created South America's largest empire, connecting their capital Cuzco to distant regions via an impressive road network. Their engineers constructed precise stone buildings, field walls, canals, and canyon bridges.
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Section 1
Early Humans Cross Land Bridge to America
Between 20,000-30,000 years ago, hunters from Asia likely crossed a land bridge created by glaciers to reach North America, gradually spreading throughout the Americas over thousands of years.
Section 2
Hunter-Gatherers Develop Farming Techniques
As large game animals disappeared, early Americans began growing food plants about 8,000 years ago. They developed irrigation methods and animal husbandry, leading to food surpluses, population growth, and trade.
Section 3
Mayas Build Advanced Cities and Scientific Knowledge
Between 250-900 CE, Mayas constructed magnificent cities with pyramids and temples. They developed written language, accurate calendars, and astronomy before mysteriously abandoning their cities around 900 CE.
Section 4
Aztecs Create Powerful Empire Around Tenochtitlan
Aztecs built their capital on lake islands, with floating crop platforms and stone roadways. Their empire controlled half of modern Mexico, but harsh rule created resentment among conquered peoples.
Section 5
Incas Connect Vast Empire Through Engineering
Incas created South America's largest empire, connecting their capital Cuzco to distant regions via an impressive road network. Their engineers constructed precise stone buildings, field walls, canals, and canyon bridges.
Book overview
Jump across lessons in the current chapter without opening the full course modal.
Continue this chapter