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