Which one of the following statements correctly describes a major difference between galaxy formation with cold dark matter and galaxy formation with hot dark matter?
A)In both cases, galaxies form by the breakup of larger objects, but the breakup occurs faster if the dark matter is hot than if it is cold.
B)With cold dark matter, galaxies form by the breakup of larger objects, whereas with hot dark matter galaxies form through the merger of smaller objects.
C)In both cases, galaxies form through the merger of smaller objects, but the merger occurs faster if the dark matter is cold than if it is hot.
D)With cold dark matter, galaxies form through the merger of smaller objects, whereas with hot dark matter, galaxies form by the breakup of larger objects.

Question

Quizplus · Accepted Answer

The major difference between galaxy formation with cold dark matter and hot dark matter is the mechanism of galaxy formation. With cold dark matter, galaxies form through the merger of smaller objects, whereas with hot dark matter, galaxies form by the breakup of larger objects. This is because hot dark matter particles move faster than cold dark matter particles and cannot clump together as easily, leading to smaller structures that eventually merge to form galaxies. On the other hand, cold dark matter particles move slower and can clump together to form larger structures that break up to form galaxies.

Which One of the Following Statements Correctly Describes a Major