Question
Which characteristics are considered most typical of an old galaxy in decline?(1 point)
Responses
low gas content, little star formation
shrinking in size, high dust content
very bright, relatively small
spiral, abundant planets present
Responses
low gas content, little star formation
shrinking in size, high dust content
very bright, relatively small
spiral, abundant planets present
Answers
Answer
Which factor is essential to the initial formation of galaxies, for either of the theories describing galaxy evolution?(1 point)
Responses
The force of orbiting stars generates collisions.
Small lumps of material merge into larger clumps.
Massive gas and dust clouds collapse.
Gravity acts on existing material, shaping it into a new form.
Responses
The force of orbiting stars generates collisions.
Small lumps of material merge into larger clumps.
Massive gas and dust clouds collapse.
Gravity acts on existing material, shaping it into a new form.
Answer
With which type of galaxy is a small galaxy most likely to merge? Select the two correct answers.(1 point)
Responses
a nearby galaxy
a much larger galaxy
a fast-moving galaxy
an equal-sized galaxy
Responses
a nearby galaxy
a much larger galaxy
a fast-moving galaxy
an equal-sized galaxy
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