Orogenesis refers to
A) the beginning of extensive faulting.
B) a general term for a mountain-building episode that thickens continental crust.
C) a general thinning of the crust.
D) the formation of mountains without faulting, folding, or the capture of migrating terranes.
B
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Several million Irish and Germans migrated in the 1840s primarily because
A) of the Black Plague. B) of disastrous economic conditions brought on by government policy and displacement by the Industrial Revolution. C) of poor environmental conditions including massive flooding. D) of religious freedom. E) Russian imperial advances threatened their livelihoods.
Surface wind speeds inside a hurricane are estimated by:
A) calculating 90% of the wind speeds measured in the upper portions of the storm. B) doubling the wind speeds measured on the outer perimeter of the storm. C) measuring them with instruments on hurricane hunter aircraft. D) analyzing wave patterns visible in satellite imagery.
____________________ is the term for molten rock material that lies beneath Earth's surface
Fill in the blank(s) with correct word
Chicago, Illinois (latitude 42°N) is located in the
a. ?northeast trades. b. ?southeast trades. c. ?westerlies. d. ?doldrums. e. ?jet stream.