The notes in the student's research log align most closely with the steady state theory. This theory posits that the universe is expanding but maintains a constant average density, with matter being continuously created to form new stars and galaxies as old ones burn out.
The responses to the student's notes would be:
- Density of the universe never changes: This reflects the steady state theory.
- Universe is constantly expanding: This is also consistent with the steady state theory.
- New stars and galaxies are created to replace those that burn out: This directly corresponds to the steady state theory as well.
In contrast, the big bang theory does not suggest a constant density or continuous creation of matter. Therefore, the correct answer is:
steady state theory.
1 answer