If the density of the universe is greater than critical,then:
A) there is more matter than energy.
B) the universe is closed, gravity wins, and will shrink to the Big Crunch.
C) the universe is flat, and Euclid is right.
D) the Universe will continue expanding forever.
E) the universe will end up as nothing but black holes.

Question

Quizplus · Accepted Answer

If the density of the universe is greater than critical, it means that there is enough matter present in the universe to overcome the expansion caused by the Big Bang. Gravity will eventually win, the universe will stop expanding, and start contracting. This contraction will continue until all matter in the Universe is collapsed into a single point, known as the Big Crunch. Therefore, choice B is the correct answer.

If the Density of the Universe Is Greater Than Critical,then