What do astronomers think is the eventual fate of a white dwarf?
What will be an ideal response?
Question 2Why is the cosmic microwave background (CMB) so cold if the early Universe was so hot?
a. Enough time has passed for matter in the universe to release enough heat to cool down.
b. The CMB constantly interacts with atoms, which effectively cool down the photons.
c. The expansion of the Universe has redshifted those photons to an effectively cooler temperature.
d. Misleading; The big bang was initially hot but the CMB was released from cold material much later on.
Question 3Explain the major differences between type II supernova and a type I supernova.
What will be an ideal response?
Question 4Where did the cosmic microwave background (CMB) come from?
a. photons emitted from the first stars
b. photons released from hydrogen in our galaxy
c. light scattered by dust in our Solar System
d. photons released when electrons and nuclei combined for the first time
Question 5Why do supernova remnants have limited lifetimes?
What will be an ideal response?
Question 6What observational evidence supports the fact that our universe is static and unchanging?
a. detection of the cosmic microwave background (CMB)
b. dark sky at night
c. redshift of galaxies
d. evolution of galaxies with distance
e. None of the other choices are correct.
Quick Reply
