As currently understood,what happens to the density of matter and the density of dark energy as the universe expands?
A) Both the density of matter and the density of dark energy increase as the universe expands.
B) The matter density decreases, but the density of dark energy increases.
C) The matter density decreases, but the density of dark energy remains constant.
D) Both the density of matter and the density of dark energy decrease as the universe expands.

Question

Quizplus · Accepted Answer

As the universe expands, the density of matter decreases because it is spread over a larger volume. However, dark energy density remains constant, as it is thought to be a property of space itself.

As Currently Understood,what Happens to the Density of Matter and the Density