Question

Which factors are most likely to affect whether a galaxy will evolve by merging with a second galaxy? Select the two correct answers.(1 point)
Responses

its age compared to that of the other galaxy
its age compared to that of the other galaxy

its size compared to that of the other galaxy
its size compared to that of the other galaxy

its proportion of gas compared to that of the other galaxy
its proportion of gas compared to that of the other galaxy

its distance from the other galaxy

Answer 1

The two factors most likely to affect whether a galaxy will evolve by merging with a second galaxy are:

1. **its size compared to that of the other galaxy** - The gravitational attraction between galaxies is influenced by their sizes (and masses), making this a significant factor in whether they will merge.

2. **its distance from the other galaxy** - The proximity of galaxies affects their likelihood of merging. If they are too far apart, the gravitational influence will be too weak for a merger to occur.

Thus, the correct answers are:
- its size compared to that of the other galaxy
- its distance from the other galaxy