Question

The ____ believes around 13.7 billion years ago the universe was a single point. The point ____ due to heat and density. Then the temperature and density decreased and the universe cooled.
Gravity
expanded
heliocentric
big bang

Answer 1

The **big bang** believes around 13.7 billion years ago the universe was a single point. The point **expanded** due to heat and density. Then the temperature and density decreased and the universe cooled.