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 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

Answer 1

[AI-generated answer — Bot GPT 3.5]

its collision course with the other galaxy

Answer 2

Select the two correct answers

Answer 3

[AI-generated answer — Bot GPT 3.5]

its proportion of gas compared to that of the other galaxy

its collision course with the other galaxy

Answer 4

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

Answer 5

[AI-generated answer — Bot GPT 3.5]

a mix of young and old stars

Answer 6

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

Answer 7

[AI-generated answer — Bot GPT 3.5]

primordial collapse

Answer 8

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

Answer 9

[AI-generated answer — Bot GPT 3.5]

in denser regions with little space between atoms

Answer 10

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.

Answer 11

[AI-generated answer — Bot GPT 3.5]

Astronomers have observed their movements over time.

Answer 12

Under the influence of gravity, over time the dense central part of a galaxy will do what?(1 point)

Responses

expand
expand

stay as it is, forces balanced
stay as it is, forces balanced

contract
contract

stay the same size but spin more slowly
stay the same size but spin more slowly

Answer 13

[AI-generated answer — Bot GPT 3.5]

contract

Answer 14

Where is most of the baryonic matter (ordinary matter) of the universe found?(1 point)

Responses

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
in comets and asteroids

in planets and natural satellites

Answer 15

[AI-generated answer — Bot GPT 3.5]

in interstellar gases and stars