Why Does the Core of the Sun Contain More Helium

question 2

Multiple Choice

Why does the core of the Sun contain more helium and less hydrogen than the surface of the Sun?

• A) The hydrogen has been lifted out of the core by the Sun's magnetic field.
• B) Helium is heavier than hydrogen and has sunk toward the center in a process of chemical differentiation.
• C) Helium condenses more easily, so when the Sun was forming the core became helium-rich; vast quantities of hydrogen were added only after the core became massive enough.
• D) Thermonuclear reactions have converted much of the original hydrogen in the core into helium.

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