Locate the origin of the paleo-indians, the first human "pioneers" of north america. 2. explain how environmental change and the extinction of large game (i. e., mammoths) contributed to the development of greater diversity among native american cultures. 3. describe how native american cultures differed from european cultures in the late 15th century. 4. identify and locate the most powerful native american culture in the new world and describe how they rose to power. 5. analyze the role of "tribute" in the advances made by the mexica society. 6. identify the major weakness of mexican society that the spanish conquerors eventually exploited.