Question

1. how is the proportion of hydrogen to helium in the suns core changing over time? (1 point)

Explanation:

In the Sun's core, hydrogen undergoes nuclear fusion to form helium. As time passes, hydrogen is being consumed and more helium is being produced. So the proportion of hydrogen is decreasing and the proportion of helium is increasing.

Answer:

The proportion of hydrogen is decreasing and the proportion of helium is increasing.