The change of water vapor to a liquid is called
A. condensation.
B. dew point.
C. saturation.
D. evaporation.
Answer: A
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Which one of the following concerning stalactites and stalagmites is not true?
a.) Stalagmites form on the floors of caves below the water table. b.) Stalactites are deposited from water dripping from the ceiling of an aerated cavern. c.) Both are composed of calcium carbonate. d.) Both are forms of dripstone; stalactites hang from the ceiling, stalagmites grow upward from the cavern floor.
Which is TRUE regarding strategic minerals?
A) China is the world's largest producer of strategic minerals. B) China is the world's largest consumer of strategic minerals. C) The world has about 1000 years worth of these minerals at current rates of consumption. D) The United States has increasingly depended on imports of these in the past fifty years. E) The Middle East is the world's most significant repository of strategic minerals.
Based on human-induced changes to the atmosphere, some have tentatively labeled Earth's next atmosphere the
A) modern atmosphere. B) anthropogenic atmosphere. C) ozonosphere. D) pollution sphere. E) living atmosphere.
Which of the following rocks has the highest porosity?
A. lightly cemented sandstone B. a coarsely crystalline granite C. a metamorphic schist or gneiss D. a fine-grained shale