Which statements describe the principles of the big bang theory? Check all that apply.
a. The universe is continuing to expand.
b. A massive explosion caused matter and energy to expand and form the universe.
c. The cause of the big bang was dark matter and dark energy.
d. The universe expanded, but its size is now remaining constant.
e. The universe is slowly collapsing and getting small.
Answer:
b. A massive explosion caused matter and energy to expand and form the universe.