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 size compared to that of the other galaxy
its size compared to that of the other galaxy
its distance from the other galaxy
its distance from 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 age compared to that of the other galaxy
Responses
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 distance from 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 age compared to that of the other galaxy
Answers
Answer
Where is most of the baryonic matter (ordinary matter) of the universe found?(1 point)
Responses
in planets and natural satellites
in planets and natural satellites
in dark matter and dark energy
in dark matter and dark energy
in interstellar gases and stars
in interstellar gases and stars
in comets and asteroids
Responses
in planets and natural satellites
in planets and natural satellites
in dark matter and dark energy
in dark matter and dark energy
in interstellar gases and stars
in interstellar gases and stars
in comets and asteroids
Answer
How do astronomers know about the future collision of Andromeda and the Milky Way?(1 point)
Responses
The two galaxies have collided previously.
The two galaxies have collided previously.
The Milky Way has changed course to head toward Andromeda.
The Milky Way has changed course to head toward Andromeda.
Astronomers have observed their movements over time.
Astronomers have observed their movements over time.
All galaxies will collide at some point.
Responses
The two galaxies have collided previously.
The two galaxies have collided previously.
The Milky Way has changed course to head toward Andromeda.
The Milky Way has changed course to head toward Andromeda.
Astronomers have observed their movements over time.
Astronomers have observed their movements over time.
All galaxies will collide at some point.
Answer
How are the bars in barred spiral galaxies thought to have formed?(1 point)
Responses
primordial collapse
primordial collapse
merging
merging
separation
separation
slow evolution
Responses
primordial collapse
primordial collapse
merging
merging
separation
separation
slow evolution
Answer
Which is a mark of a galaxy formed by collapse?(1 point)
Responses
uniformly young stars
uniformly young stars
same age stars
same age stars
abundant gas and dust
abundant gas and dust
a mix of young and old stars
Responses
uniformly young stars
uniformly young stars
same age stars
same age stars
abundant gas and dust
abundant gas and dust
a mix of young and old stars
Answer
When parts of a gas cloud collapse, where does the material first form clumps?(1 point)
Responses
in less dense regions with little space between atoms
in less dense regions with little space between atoms
in less dense regions with more space between atoms
in less dense regions with more 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
Responses
in less dense regions with little space between atoms
in less dense regions with little space between atoms
in less dense regions with more space between atoms
in less dense regions with more 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
Answered by
GPT-4o mini
The two factors that are 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 relative sizes of the galaxies can influence the dynamics of the merger, such as gravitational influences and the likelihood of merging.
2. **its distance from the other galaxy** - The distance between galaxies plays a critical role in determining whether they will merge. Closer galaxies are more likely to interact and merge due to stronger gravitational influences.
The proportion of gas and the age of the galaxies can also influence their evolution, but they are generally secondary factors regarding the likelihood of a merger occurring.
1. **its size compared to that of the other galaxy** - The relative sizes of the galaxies can influence the dynamics of the merger, such as gravitational influences and the likelihood of merging.
2. **its distance from the other galaxy** - The distance between galaxies plays a critical role in determining whether they will merge. Closer galaxies are more likely to interact and merge due to stronger gravitational influences.
The proportion of gas and the age of the galaxies can also influence their evolution, but they are generally secondary factors regarding the likelihood of a merger occurring.
Answered by
GPT-4o mini
Most of the baryonic matter (ordinary matter) of the universe is found **in interstellar gases and stars**. This includes the matter that makes up stars, galaxies, and the gas found in the space between stars, which collectively account for the majority of the baryonic component of the universe.
Answered by
GPT-4o mini
Astronomers know about the future collision of Andromeda and the Milky Way primarily because **astronomers have observed their movements over time**. Through detailed measurements of the velocities and positions of both galaxies, astronomers have been able to predict their future trajectories and conclude that they are on a collision course.
Answered by
GPT-4o mini
The bars in barred spiral galaxies are thought to have formed through **slow evolution**. Over time, gravitational interactions and the dynamics of star orbits within the galaxy can lead to the formation of a bar structure, making this process gradual rather than the result of a sudden event like merging or primordial collapse.
Answered by
GPT-4o mini
A mark of a galaxy formed by collapse is **a mix of young and old stars**. This variety in stellar ages indicates that the galaxy has undergone a prolonged process of formation, where gas and dust collapsed to form stars over time, resulting in a population that includes both younger and older stars.
Answered by
GPT-4o mini
When parts of a gas cloud collapse, the material first forms clumps **in denser regions with little space between atoms**. In these denser areas, the gravitational pull is stronger, leading to the formation of structures as material collapses under its own gravity.
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