Why do we think Mercury has so many tremendous cliffs?
A) They were probably carved in Mercury's early history by running water.
B) They were probably formed by tectonic stresses when the entire planet shrank as its core cooled.
C) They probably formed when a series of large impacts hit Mercury one after the other.
D) They are almost certainly volcanic in origin,carved by flowing lava.
E) They represent one of the greatest mysteries in the solar system,as no one has suggested a reasonable hypothesis for their formation.
Correct Answer:
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Q38: The relatively few craters that we see
Q39: Which of the following describes impact cratering?
A)the
Q40: Steep-sided stratovolcanoes are made from lava that
A)is
Q41: The Caloris Basin on Mercury covers a
Q42: Which of the following show evidence of
Q44: Why is continental crust lower in density
Q45: Valles Marineris is a
A)large valley on the
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