What is the Gaia hypothesis?
A) a hypothesis that states the Earth is alive
B) the concept of environmental unity
C) the hypothesis lying at the root of uniformitarianism
D) a set of hypotheses that likens the Earth to a superorganism with interrelated, mutually adjusting systems
D
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True or False: In order to produce sand-size rock fragments the crystal- or grain-size in the weathered rock must be larger than 2 mm
Indicate whether this statement is true or false.
Eddies
A) are usually at least a mile in diameter. B) lose energy to molecular viscosity. C) accelerate winds. D) are not affected by solar heating. E) none of the above
After the fall of the Soviet Union, some 25 million Russians found themselves to be ethnic minorities in newly independent countries. The largest number of minorities was found in what state?
A) Latvia B) Estonia C) Belarus D) Lithuania E) Ukraine
Geographer and historian William Cronon argues that settlers leaving Chicago would encounter which of the following economic land use activities sequences as they traveled further westward?
A. dairies, corn and wheat, orchards, garden markets, ranching, trapping, wilderness B. wilderness, trapping, ranching, orchards, corn and wheat, orchards, garden markets, dairy C. dairies, garden markets, orchards, corn and wheat, ranching, trapping, wilderness D. orchards, dairies, corn and wheat, garden markets, ranching, trapping, wilderness