BIO 101 Chapter 100: AP US History Notes
Document Summary
225 million years ago, there was a single supercontinent: enormous chunks of land and terrain began to drift away from this continent, opening the atlantic and indian oceans, eurasia, africa, australia, antarctica, and the americas were formed. Great ice age: 2 mile thick ice sheets crept from the polar regions to blanket parts of europe, Asia, and the americas: when the glaciers retreated, the left north america transformed, much as we know it today. Examples of early civilizations that evolved: incas (peru, mayans (central america, aztecs (mexico) These early civilizations relied heavily on maize, or indian corn. Agriculture, especially corn growing, accounted for the size and sophistication of the native. Agriculture began transforming nomadic hunting tribes into settled agricultural villagers. Corn planting spread into the american southwest, molding pueblo culture in the rio grande. Tuesday, june 3, 2014 valley: pueblo means village in spanish, intricate irrigation systems, multi-story dwellings. Corn cultivation reached other parts of north america much later.
