The process ny which a planet becomes zoned with heavy material near its center and lighter materials neat its surface

Find the coordinates of a if b(-9,-10) is the midpoint of ac and c has the coordinates of (-1,9)

How have ethnic groups shaped the population in central america and the caribbean? how has migration shaped the population in central america and the caribbean? how has small land areas shaped population in central america and the caribbean? how has a rapid population growth shaped the population in central america and the caribbean?

What has been a consequence of human economic development in advancing nations? a) subsistenceb) conservationc) photosynthesisd) pollution