Multiple Choice
Figure 18-12 (for the following questions) The change from a radiation-dominated to a matter-dominated Universe occurred at a temperature closest to ____ of degrees Kelvin.
A) millions
B) hundreds of thousands
C) tens of thousands
D) thousands
E) hundreds
Correct Answer:

Verified
Correct Answer:
Verified
Q45: The cosmological principle states that any observer
Q46: The expansion of the Universe _.<br>A) was
Q47: The Universe has_.<br>A) an edge, does not
Q48: The heaviest element created in the big
Q49: The big bang only created hydrogen and
Q51: The evolution of the distribution of dark
Q52: Why do astronomers conclude that the Universe
Q53: The cosmic microwave background radiation comes from
Q54: The radiation detected by Penzias and Wilson
Q55: The four fundamental forces in the Universe