The atmosphere has the greatest ________ of the earth's hydrologic compartments.
A. Discharge rate and water content
B. Water volume
C. Residence time for water
D. Turnover rate and smallest water volume
E. All of these choices are correct
Answer: D
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The event horizon of a black hole is
A. the point in time when a black hole comes into being. B. the physical surface of the black hole. C. the surface below which no matter or energy can escape. D. the surface where light becomes trapped in a circular orbit around the black hole.
Someone argues that he or she doesn't drink tap water because it contains thousands of molecules of some impurity in each glass. How would you respond in defense of the water's purity, if it indeed does contain thousands of molecules of some impurity per glass?
A. The water contains water molecules and each water molecule is pure. B. Compared to the billions and billions of water molecules, a thousand molecules of something else is practically nothing. C. There's no defense. If the water contains impurities, it should not be drunk. D. Impurities aren't necessarily bad, in fact, they may be good for you.
Accumulated rock-fall debris along the margin of a glacier is called
A) a lateral moraine. B) a medial moraine. C) an esker. D) a kame.
For the following balanced reaction, which of the following is a gas? 2 Na(l) + Cl2(g) ? 2 NaCl(s)
A) Na B) 2 Na C) Cl2 D) Cl E) NaCl