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lesson pretestMultiple Choice

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Question 1 • Physics

Which processes transfer energy from the core to the photosphere?

Answer
A
conduction, then friction
B
convection, then conduction
C
radiation, then friction
D
radiation, then convection

Explanation

Energy moves outward from the Sun’s core through the radiative zone mainly by radiation. In the outer convection zone, hot plasma rises and cooler plasma sinks, carrying energy toward the photosphere by convection. So the sequence is radiation, then convection, which is choice D.

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