The percentage of hydrogen in the Sun's core today is roughly ________ of what it was originally.
A) half
B) one-third
C) one-quarter
D) 10 percent
E) less than 1 percent

Question

Quizplus · Accepted Answer

The Sun has been converting hydrogen into helium in its core through nuclear fusion for about 4.6 billion years. Currently, about half of the original hydrogen in the Sun's core has been converted into helium.

The Percentage of Hydrogen in the Sun's Core Today Is