Which of the following is not one of the eight most common elements in earths continental
a. carbon
b. silicon
c. oxygen
d. aluminum

Which of the following regions suffers the most from acid rain? a. the area around vancouver c. the area below atlanta b. the area below detroit d. the area above montreal

Witch of the following types of boundaries is most likely to result in a subduction zone

What sequence of events connects the industrial revolution, industrial capitalism, communism, and the cold war?