Air warmed near equatorial regions rises and then normally sinks at
A. polar regions.
B. the midlatitudes.
C. low latitudes.
D. tropical regions.
Answer: A
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Geologists studying Mount St. Helens make a connection between logs in Spirit Lake and
A. Vertical B. 1/40 scale C. In a short period of time. D. Petrified trees.
Which ester is formed by the reaction of CH3COOH and CH3CH2CH2OH?
A) ethyl acetate B) ethyl propanoate C) propyl acetate D) none of these
Which of the following best represents the sequence by which a continent splits apart?
A. continental rifting, then seafloor spreading, then uplift due to mantle upwelling B. seafloor spreading, then continental rifting, then uplift due to mantle upwelling C. uplift due to mantle upwelling, then continental rifting, then seafloor spreading D. None of these choices are correct.
Stripes of reversals of the Earth's magnetic field, when found in symmetrical bands in rock on the seafloor on opposite sides of ridges, were proof of _____.
A ) constancy of the magnetic field B ) the age of the Earth C ) seafloor spreading D ) magnetite in basaltic rocks