Planetary differentiation relies upon
A) heat.
B) chemical composition.
C) pressure.
D) density.
Answer: D
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When it is summer in the Northern Hemisphere, Earth is tilted
A) so that the North Pole tilts toward the Sun. B) so that the North Pole tilts away from the Sun. C) so that the South Pole tilts toward the Sun. D) so that the North Pole and South Pole are equidistant from the Sun.
______ River or Russia's Matushka "Mother" river
Fill in the blank(s) with correct word
Features that grow up from a cavern floor are known as ____
a. uvalas b. swallow holes c. stalactites d. stalagmites
How would this diagram change if the seismic station was farther from the earthquake? 
A. The S-waves would arrive later. B. The P-waves would arrive later. C. There would be a larger gap between the arrivals of the P- and S-waves. D. All of these choices are correct.