Mars Has a Diameter That Is Approximately Half That of Earth's

question 13

Multiple Choice

Mars has a diameter that is approximately half that of Earth's. If the interiors of these planets are heated by radioactive decays, how does the heating rate of Mars' interior compare to that of Earth's?

• A) Mars's heating rate is 0.125 times that of Earth's.
• B) Mars's heating rate is 8 times that of the Earth's.
• C) Mars's heating rate is 0.5 times that of Earth's.
• D) Mars's heating rate is 4 times that of the Earth's.
• E) The heating rates are about the same.

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