What does a porphyritic texture tell us about the history of an igneous rock? What will be an ideal response?
The magma cooled at two rates: first slowly, probably underground, and then more rapidly.
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The Montreal Protocol of 1987 was an international treaty that halted the production of ________
A) nuclear weapons B) carbon dioxide C) water vapor D) automobiles E) chlorofluorocarbons
The hot, desert air of the Sahara often contains ____ water vapor than the cold, polar air farther north, therefore has a ____ specific humidity
a. less; lower b. less; higher c. less; similar d. more; higher e. more; lower
What specifically describes the balance between the lithosphere floating atop the asthenosphere?
a. Buoyancy b. Isostatic equilibrium c. Density stratification d. Compensation
From what direction does a northeast wind blow? Toward what direction does a south wind blow?
What will be an ideal response?