What is the main energy source for the hydrologic cycle?
a. evaporative cooling
b. greenhouse effect
c. gravity
d. solar energy
e. natural gas
d
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Erupting shield volcanoes are rather ____________________ compared with the eruptions of those at convergent plate boundaries
Fill in the blank(s) with correct word
The balance of sediment input and output along a stretch of coastline is called the ________
Fill in the blank(s) with correct word
Of the three Pacific island groupings, the one covering the largest land/ocean area is:
A) Micronesia B) Melanesia C) Polynesia D) They are all about the same.
Where will the North Star be, relative to the celestial coordinates, 12,000 years from now?
A) 23 1/2 degrees away from the pole, due to precession. B) Several degrees from the North Pole position, with Vega as the North Star. C) Right where it is now; it isn't going anywhere. D) None of these is correct.