Why are flash floods more common in dry climates than wet climates?
a. ?The rainfall intensity is greater.
b. ?Individual storms last longer.
c. ?The soil is less permeable.
d. ?The river channels are not as deep.
e. ?The channel gradients are steeper, so the water flows faster.
ANSWER: c
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A) consists of only terrestrial organisms, while the hydrosphere includes aquatic and marine organisms. B) only includes the biotic components of an ecosystem, with the abiotic components being considered part of the lithosphere, hydrosphere, or atmosphere, respectively. C) is more a theoretical construct than an observable sphere of study. D) extends from the ocean floor to an altitude of approximately 8 km (5 mi) into the atmosphere.
Concern about exploiting these is that disturbing the material by mining may release potent greenhouse gases into the atmosphere.
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