On average, what weather phenomenon kills the most people in the U.S. every year?
A. hurricane
B. lightening
C. excessive heat
D. tornado
Answer: C
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Assume that water filling a crack in a rock undergoes cycles of freezing and melting. Which of the following statement is true?
a. Water shrinks as it melts, causing the crack walls to be pulled closer together. b. Water expands as it melts, causing the crack walls to be pushed apart. c. Water shrinks as it freezes, causing the crack walls to be drawn closer together. d. Water expands as it freezes, causing the crack walls to be pushed apart.
Water is a renewable resource that circulates continually between the atmosphere and:
A. The ozone B. The Earth's surface C. The outer limits D. The temperate zone
"Snow bird" (individuals who reside in the north during the summer and move south in the winter) movement from north to south
A) is specific to the United States' elderly population. B) demonstrates an environmental pull factor. C) represents counterurbanization. D) demonstrates a cultural pull factor. E) represents internally displaced retirees.
In reality, biomes
a. are not uniform but consist of a mosaic of patches each with somewhat different biological communities b. are not uniform but consist of a mosaic of patches, each with the same biological communities c. are very uniform, but can have normal variations in temperatures from one region to another d. are very uniform in order to resist environmental disruptions e. are very diverse in order to resist environmental disruptions to the sameness of all communities in the biome