Which statement is part of the Big Bang Theory? *

the universe began as a very high density singularity

Small spiral galaxies become larger elliptical galaxies

Dark matter makes up the majority of matter in the galaxy.

The chemical makeup of the universe has changed dramatically

the universe began as a very high density singularity

The statement that is part of the Big Bang Theory is: "the universe began as a very high density singularity."

To arrive at this answer, we need to understand what the Big Bang Theory is. The Big Bang Theory is a scientific explanation for the origin of the universe. According to this theory, the universe began as an extremely hot and dense singularity, a tiny point of infinite density and temperature. It then rapidly expanded and continues to expand, thus giving rise to the universe as we know it.

Out of the options provided:
1. "The universe began as a very high density singularity." - This statement aligns with the central idea of the Big Bang Theory mentioned above.
2. "Small spiral galaxies become larger elliptical galaxies." - This statement is unrelated to the Big Bang Theory and is not a part of it.
3. "Dark matter makes up the majority of matter in the galaxy." - While the presence of dark matter is an important aspect of our understanding of the universe, it specifically refers to the majority of matter in the universe, not just in a single galaxy. So this statement is not directly related to the Big Bang Theory.
4. "The chemical makeup of the universe has changed dramatically." - This statement does not specifically relate to the initial conditions or the expansion of the universe as described by the Big Bang Theory.

Therefore, the correct statement that is part of the Big Bang Theory is: "the universe began as a very high density singularity."

The statement that is part of the Big Bang Theory is:

- The universe began as a very high density singularity