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Complete Question Explanation

Resolve the Paradox. The correct answer choice is (B)

The scientist quoted in this stimulus points out some of the similarities between Earth and Venus: Both planets have a hot molten core, and each needs to get rid of the excess heat that is generated by these molten cores. On Earth, the heat that is generated by the planet’s hot molten core is expelled through volcanoes and fissures that materialize during the separation of Earth’s tectonic plates. Venus, however, has no active volcanoes, and the planet also has no tectonic plate shift-created fissures.

Since the stimulus deals with an apparent discrepancy, the fact that a Resolve the Paradox question follows should not be surprising. The correct answer choice to this question should provide some means by which Venus is able to expel heat, as Earth does, in spite of its having neither active volcanoes or fissures.

Answer choice (A): This choice provides how the surface rocks might absorb a lot of core heat, but that does not explain how Venus is able to expel the excess heat generated by its core, despite the fact that the planet does not have the devices that enable Earth to do so. This answer choice does not resolve the paradox presented by the author, so it cannot be the correct answer to this Resolve question.

Answer choice (B): This is the correct answer choice. This choice provides an alternative approach for Venus, a planet lacking in both fissures and active volcanoes, to deal with the excess heat created by the planet’s core: If, as this choice provides, the surface of Venus is thin enough to allow excess heat to radiate into space, that explains how Venus is able to deal with the extra heat created by its core.

Answer choice (C): Interior changes in temperature do not help to explain how Venus is able to expel excess heat without the volcanoes and fissures that enable Earth to expel its core-created heat. This choice fails to resolve the discrepancy presented in the stimulus.

Answer choice (D): This choice is appealing because it provides support for the idea that Venus and Earth are similar. Without the volcanoes and fissures that Earth uses to expel the excess heat produced in its core, however, similar surface movement does not provide any explanation for how Venus is able to deal with the same issues, so this choice fails to resolve the paradox and should be eliminated.

Answer choice (E): This choice provides that Venus’ atmosphere is hotter than that of Earth, but regardless of the heat of its atmosphere, Venus still needs to somehow expel the excess heat produced in its core. Since this choice fails to explain how it does so without volcanoes or fissures, this choice should be eliminated from contention for this Resolve the Paradox question.

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