One characteristic of a "great circle" is that it must pass through both the north and south poles
Indicate whether the statement is true or false
F
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Which of the following is true of general circulation models?
A) They are mere extrapolations of past atmospheric behavior. B) They are purely statistical in nature. C) They cannot determine the causes of climate change. D) They simulate atmospheric and oceanic behavior based on well-established physical theory.
Assume that these categories represent a progression of degradation through time. In other words, if left unchecked, lightly degraded soil progresses into moderately degraded soil and so forth. Which continent poses the greatest concern for future loss of agricultural productivity?
a. South America b. North America c. Africa d. Europe e. Asia
Provide a brief discussion of the internal structure of the Earth. What are the physical
characteristics of each of the layers? What caused the “differentiation” of the Earth? What will be an ideal response?
The Milky Way is
A. the remains of a galaxy that has run its life course. B. a spiral galaxy. C. an elliptical galaxy. D. a galaxy in the making. E. an irregular galaxy.