1) Symmetry is a key process in the early Universe because it a) provides a sour
ID: 1309925 • Letter: 1
Question
1) Symmetry is a key process in the early Universe because it
a) provides a source of order
b) violates conservation laws and produces matter
c) is a method to fill an empty Universe
d) turns energy solely into matter
e) all of the above
2) Symmetry breaking
a) is a phase change in the Universe
b) happens at the unification points of the fundamental forces
c) releases energy
d) increases entropy
e) all of the above
3) The flatness problem is due to
a) the Universe is filled with matter
b) the Universe is expanding
c) a value for ? of 1 is unstable
d) the Universe is old
e) the Universe is isotropic
4) The horizon problem is due to
a) the Universe is expanding
b) the speed of light is finite
c) an isotropic Universe
d) observations of distant galaxies
e) all of the above
5) Inflationary cosmology means that
a) the Universe expanded faster than the speed of light
b) the Universe undergoes phase changes
c) the Universe has a creation point
d) the Universe was once hot and dense
e) none of the above
6) The amount of inflation is around
a) 1060
b) 1030
c) 1020
d) 1010
e) 100
7) An inflation Universe must be
a) flat
b) expanding
c) ? equal to 1
d) limited by a horizon
e) all of the above
8) Inflation predicts
a) the Universe will someday collapse
b) dark matter
c) we are one Universe in a much larger Multiverse
d) a increasing ? value
e) a and b
9) If the Universe is 13 billion years old and is expanding at a rate of 1 light-year per year, when will it be double its current radius
a) never
b) at 13 billion years
c) at 26 billion years
d) at 39 billion years
e) soon
10) How do we know that ? is not a very large value, like 100?
a) the Universe is not contracting
b) the oldest rocks are 4.5 billion years old
c) Hubble's constant is small
d) the number of nearby stars is small
e) all of the above
Explanation / Answer
1) Symmetry is a key process in the early Universe because it
a) provides a source of order
b) violates conservation laws and produces matter
c) is a method to fill an empty Universe
d) turns energy solely into matter
e) all of the above
2) Symmetry breaking
a) is a phase change in the Universe
b) happens at the unification points of the fundamental forces
c) releases energy
d) increases entropy
e) all of the above
3) The flatness problem is due to
a) the Universe is filled with matter
b) the Universe is expanding
c) a value for ? of 1 is unstable
d) the Universe is old
e) the Universe is isotropic
4) The horizon problem is due to
a) the Universe is expanding
b) the speed of light is finite
c) an isotropic Universe
d) observations of distant galaxies
e) all of the above
5) Inflationary cosmology means that
a) the Universe expanded faster than the speed of light
b) the Universe undergoes phase changes
c) the Universe has a creation point
d) the Universe was once hot and dense
e) none of the above
6) The amount of inflation is around
a) 1060
b) 1030
c) 1020
d) 1010
e) 100
7) An inflation Universe must be
a) flat
b) expanding
c) ? equal to 1
d) limited by a horizon
e) all of the above
8) Inflation predicts
a) the Universe will someday collapse
b) dark matter
c) we are one Universe in a much larger Multiverse
d) a increasing ? value
e) a and b
9) If the Universe is 13 billion years old and is expanding at a rate of 1 light-year per year, when will it be double its current radius
a) never
b) at 13 billion years
c) at 26 billion years
d) at 39 billion years
e) soon
10) How do we know that ? is not a very large value, like 100?
a) the Universe is not contracting
b) the oldest rocks are 4.5 billion years old
c) Hubble's constant is small
d) the number of nearby stars is small
e) all of the above
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