Which of the following is NOT responsible for the urban heating effect?
A) Increase in human-made materials that conduct more energy than natural surfaces.
B) Increased albedo of urban environments relative to that of natural landscapes.
C) The concentration of people, machines and heat generating devices adds more heat to the environment.
D) Increased air pollution that absorbs and reradiates heat to surface.
E) Heat generated by homes, vehicles, and factories.
B
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Hydrogen fuel cells
A. rely on direct energy from the sun. B. use geothermal energy to produce electricity. C. combine hydrogen and oxygen gas to produce electricity and water vapor. D. require complex carbohydrates as starting materials. E. break apart water molecules and use the hydrogen as energy.
Urbanization in the Russian region
A) was helped by laws allowing unrestricted internal migration during the Soviet period. B) did not really increase significantly until the 1960s. C) was discouraged throughout the history of the Russian Domain. D) was often planned in detail during the Soviet period. E) is far below that of Western Europe.
In a battery, the following two oxidation-reduction reactions are taking place: rxn A: Zn + 2 OH- ? ZnO + H2O + 2e- rxn B: 2 MnO2 + H2O + 2e- ? Mn2O3 + 2 OH- What is undergoing oxidation?
A) Zn B) ZnO C) MnO2 D) H2O E) OH-
____________ is a systematic process of asking questions about the observable world by gathering and then studying
information (data). Fill in the blank(s) with the appropriate word(s).