What process involves the use of plants to remove contaminants from polluted soil and water?
A. Phytoremediation
B. Plasma gasification
C. Bioremediation
D. Incineration
E. Composting
Answer: A
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Which alternative energy source does NOT utilize direct solar energy?
a. power towers b. parabolic troughs c. dish/engine concentrator d. vapor hydrothermal e. photovoltaic
Which of the following molecules is most likely to show a dipole-dipole interaction?
A. CH4
B. H-C 
C-H
C. CO2
D. H2S
E. none of the above
Why does sandstone fracture more easily than shale when uplifted?
What will be an ideal response?
What is the correct order of the layers of the Earth?
A) mantle, continental crust, oceanic crust, inner, and outer core B) continental crust, oceanic crust, outer core, mantle, inner core C) continental crust, oceanic crust, mantle, outer core, inner core D) outer core, oceanic crust, continental crust, mantle, inner core