chap_1_earth_7th_edition_de_blij.pdf

Name: ___________________________________________ Period: ________ Date: _________ Unit 1 The Earth as Humanity?s Home AP Human Geography Development of Agriculture __________ ________ = the current interglacial period, extending 12,000 years ago. Perhaps 4 -8 million people were alive at the beginning of this period ________ __________ = the process of planned cultivation of root and/or seed crops that began as early as 14,000 years ago in several culture hearths across the globe; may have begun in southeastern Asia (Sauer) ? ______ ______ = plants that grow as tubers in the tropics (yams, sweet potatoes, manioc,?) ? ______ ______ = field crops, such as barley or wheat; more complex cultivation process involving