Which of the following types of rocks are likely to be formed due to heat and pressure? Select one:
a. Sedimentary rock only
b. Metamorphic rock only
c. Both sedimentary rock and metamorphic rock
d. Neither sedimentary rock nor metamorphic rock

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

Which are practical examples of how people in the developed world could make a big difference in how much water they use check all that apply a. use lightbulbs that use less electricity b. consider using a composting toilet that does not use water c. avoid using your telephone during peak hours d. do not read books

In what type of geographic location did humans tend to develop civilizations?