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 proportion of gas compared to that of the other galaxy
its proportion of gas compared to that of the other galaxy
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 distance from the other galaxy
its collision course with the other galaxy
Select the two correct answers
its proportion of gas compared to that of the other galaxy
its collision course with the other galaxy
Which is a mark of a galaxy formed by collapse?(1 point)
Responses
same age stars
same age stars
uniformly young stars
uniformly young stars
a mix of young and old stars
a mix of young and old stars
abundant gas and dust
a mix of young and old stars
How are the bars in barred spiral galaxies thought to have formed?(1 point)
Responses
separation
separation
slow evolution
slow evolution
merging
merging
primordial collapse
primordial collapse
When parts of a gas cloud collapse, where does the material first form clumps?(1 point)
Responses
in less dense regions with more space between atoms
in less dense regions with more space between atoms
in less dense regions with little space between atoms
in less dense regions with little space between atoms
in denser regions with more space between atoms
in denser regions with more space between atoms
in denser regions with little space between atoms
in denser regions with little space between atoms
How do astronomers know about the future collision of Andromeda and the Milky Way?(1 point)
Responses
All galaxies will collide at some point.
All galaxies will collide at some point.
Astronomers have observed their movements over time.
Astronomers have observed their movements over time.
The Milky Way has changed course to head toward Andromeda.
The Milky Way has changed course to head toward Andromeda.
The two galaxies have collided previously.