Today, more than ________ percent of Earth's surface is affected by periglacial conditions
A) 90
B) 75
C) 60
D) 20
E) 1
Answer: D
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East Asia is located in roughly the same latitudinal zone as which of the following world regions?
A) The Caribbean B) North America C) Latin America D) Africa E) Australia and Oceania
What is average residence time?
A) the average time required for the total stock of a material to be cycled through a system B) the average time that a human population can stay in an area before environmental conditions force them to move C) the average time required for an open system to convert to a closed system D) the average time for a system to run out of energy
Which of the following factors will not play a role in the way rivers flow?
A. The underlying geologic structure of faults and or folds. B. The speed with which the water is flowing. C. The resistance to erosion of the materials that make up the channel. D. Dams along a stream channel. E. All of these choices are correct.
Which statement is false?
A. CFCs are persistent chemicals. B. Ozone depletion is worst in Antarctica. C. CFCs substitutes have been found. D. Ozone thinning levels remain steady over seasons. E. CFCs contribute to global warming.