The depth below which there is no wave motion is called the
A) wavelength.
B) wave base.
C) wave period.
D) wave height.
Answer: B
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According to a number of environmental and social scientists, four basic causes of environmental degradation are
A. poverty, population growth, unmanageable growth of resources, and government corruption. B. poverty, population decline, unsustainable resource use, and failure to include environmental costs in market prices. C. poverty, population growth, unsustainable resource use, and failure to include environmental costs in market prices. D. poverty, population growth, unsustainable resource use, and government corruption. E. poverty, population decline, unsustainable resource use, and including environmental costs in market prices.
Volcanic island chains forms over hot spots when the
A) hot spot travels. B) tectonic plate carrying the volcanoes travels over the stationary hot spot. C) hot spot expands. D) all of these
Minerals can be composed of:
a. atoms b. ions c. isotopes d. all of the above
Eruptive activity at the summit of the Nevada del Ruiz volcano in Colombia in 1985 caused snow and ice to melt, generating a ________ that killed 23,000 people in the village of Armero.
A. gas cloud B. mud flow C. hyaloclastic flow D. lava flow E. pyroclastic flow