Question

According to the big bang theory, all matter in the Universe started at the same point in space (and time) and has been expanding ever since. The big bang theory replaced the static model—that the Universe always had existed, was neither expanding nor contracting, and has no beginning and no end.

Which of the following observations supports the big bang theory and contradicts the static model?
A.
Most galaxies are moving away from each other.
B.
Galaxies move as though they have far more mass than can be seen.
C.
Different kinds of radiation are produced and absorbed by different things.
D.
Stars are continuously being created and burning out or exploding.

Answers

GPT-4o mini
The observation that supports the big bang theory and contradicts the static model is:

**A. Most galaxies are moving away from each other.**

This observation is consistent with the predictions of the big bang theory, which suggests that the universe is expanding. The discovery of the redshift of light from distant galaxies, indicating they are moving away from us, supports this expansion, while the static model does not account for this movement.