Why Do We Think Mercury Has So Many Tremendous Cliffs

question 81

Multiple Choice

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.

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Definitions:

Diatheses

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Electroconvulsive Therapy, a psychiatric treatment where seizures are electrically induced in patients to provide relief from mental disorders.

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