________ is the study of how we decide to use scarce resources in the face of demand
A) Ethics B) Economics
C) Ecology D) Environmental science
B
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Cells that convert solar energy directly into electricity are called
A. electrosolar chips. B. photovoltaic cells. C. helioelectric units. D. photoelectric cells. E. solarelectric cells.
Instructions: Choose one answer from each pair or group of selections. Would LONGITUDE or LATITUDE generally have the greatest effect on a region's climate?
Satellites in a(n) _______________ orbit stay located over the same spot above Earth
Fill in the blank(s) with correct word
One significant difference between oceanic and continental crust in terms of the long term evolution of the earth's surface is that ________
A) continental crust is more uniform in composition than oceanic crust B) oceanic crust contains more radioactive elements that contribute to the heating of the earth. C) oceanic crust is less dense than continental crust D) oceanic crust preserves a history of ancient deformation better than continental crust E) continental crust is harder to subduct than oceanic crust