Question 1

In an open universe two parallel beams of light will:

Accepted Answer

A)  remain parallel.
B)  diverge.
C)  converge.
D)  circle back on themselves.
E)  continue on forever.

Question 2

In which of the following models will the universe stop expanding?

Accepted Answer

A)  Open Universe
B)  Closed Universe
C)  Critical Density Universe
D)  Steady State Universe
E)  All have an ultimate collapse.

Question 3

The universe has been expanding at the same rate since its formation.

Accepted Answer

A) True 
 B)False

Question 4

What is the study of cosmology?

Accepted Answer

The study of large-s...

Question 5

The low-density universe is an open one, with expansion continuing forever.

Accepted Answer

A) True 
 B)False

Question 6

The concept that on the grandest of scales, the universe is similar in appearance everywhereis:

Accepted Answer

A)  special relativity.
B)  general relativity.
C)  homogeneity.
D)  isotropy.
E)  universality.

Question 7

The cosmic microwave background is the total of all the radio emissions from all thegalaxies and quasars in the universe.

Accepted Answer

A) True 
 B)False

Question 8

With the exception of a few nearby objects, every galaxy in the universe is rapidly movingaway from ours; therefore, ________.

Accepted Answer

The answer of With the exception of a few nearby...

Question 9

An infinite universe is one of the assumptions of the cosmological principle.

Accepted Answer

A) True 
 B)False

Question 10

The cosmic microwave background is:

Accepted Answer

A)  redshifted in the direction of Earth's motion.
B)  redshifted in the direction of the Sun's motion.
C)  redshifted in the direction of the center of the Milky Way.
D)  blueshifted in the direction of Earth's motion.
E)  blueshifted in the direction of the Virgo Cluster.

Question 11

In our best current theory, the first quasars formed about:

Accepted Answer

A)  14.5 billion years ago.
B)  13 billion years ago.
C)  12 billion years ago.
D)  11 billion years ago.
E)  9 billion years ago.

Question 12

If the density of the universe is lower than the critical density, this means that:

Accepted Answer

A)  the universe is expanding at a rate equal to the escape speed of the universe.
B)  the universe is expanding at a rate less than the escape speed of the universe.
C)  the universe is expanding at a rate greater than the escape speed of the universe.
D)  the universe is expanding at a rate equal to the speed of light.
E)  the universe is expanding at a rate greater than the speed of light.

Question 13

What was there just after the Big Bang?

Accepted Answer

A)  nothing
B)  the primeval fireball
C)  a singularity
D)  a black hole
E)  everything was inside Earth

Question 14

If the geometry of the universe can be shown to be Euclidean, then the density of the universe________ the critical density.

Accepted Answer

The answer of If the geometry of the universe can...

Question 15

Is the cosmological redshift really a velocity of a given galaxy?

Accepted Answer

No, it is a measure of how fas...

Question 16

The ratio of the universe's actual density to the critical density is:

Accepted Answer

A)    ρcritical . ho _ { 	ext {critical } } 	ext {. }ρcritical ​.  
B)    π/ρ\pi / hoπ/ρ 
C)    Ω0\Omega _ { 0 }Ω0​ 
D)  H/D.
E)  1/H.

Question 17

According to the main sequence turn-off points of the oldest globular clusters, they areabout:

Accepted Answer

A)  4.5 billion years old.
B)  6.8 billion years old.
C)  10 billion years old.
D)  12 billion years old.
E)  16 billion years old.

Question 18

When the microwave background radiation was emitted, about how big was the universe?

Accepted Answer

A)  smaller than the head of a pin
B)  1/1,000,000 its current size
C)  1/100,000 its current size
D)  1/1,000 its currents size
E)  1/100 its current size

Question 19

What are the three possible types of universe and what features distinguish them?

Accepted Answer

Open universe will expand forever, witho...

Question 20

When dark energy is thrown into the mix, present observational data seem to indicate that theuniverse will ________.

Accepted Answer

be open or...

Exam 26: Cosmology: The Big Bang and the Fate of the Universe

What was there just after the Big Bang?

Correct AnswerverifiedShow Answer

The ratio of the universe's actual density to the critical density is:

Correct AnswerverifiedShow Answer

When the microwave background radiation was emitted, about how big was the universe?

Correct AnswerverifiedShow Answer

The low-density universe is an open one, with expansion continuing forever.

Correct AnswerverifiedShow Answer

Is the cosmological redshift really a velocity of a given galaxy?

Correct AnswerverifiedNo, it is a measure of how fas...View AnswerShow Answer

In which of the following models will the universe stop expanding?

Correct AnswerverifiedShow Answer

An infinite universe is one of the assumptions of the cosmological principle.

Correct AnswerverifiedShow Answer

The concept that on the grandest of scales, the universe is similar in appearance everywhereis:

Correct AnswerverifiedShow Answer

What is the study of cosmology?

Correct AnswerverifiedThe study of large-s...View AnswerShow Answer

The cosmic microwave background is the total of all the radio emissions from all thegalaxies and quasars in the universe.

Correct AnswerverifiedShow Answer

In our best current theory, the first quasars formed about:

Correct AnswerverifiedShow Answer

What are the three possible types of universe and what features distinguish them?

Correct AnswerverifiedOpen universe will expand forever, witho...View AnswerShow Answer

If the density of the universe is lower than the critical density, this means that:

Correct AnswerverifiedShow Answer

When dark energy is thrown into the mix, present observational data seem to indicate that theuniverse will ________.

Correct Answerverifiedbe open or...View AnswerShow Answer

According to the main sequence turn-off points of the oldest globular clusters, they areabout:

Correct AnswerverifiedShow Answer

In an open universe two parallel beams of light will:

Correct AnswerverifiedShow Answer

The universe has been expanding at the same rate since its formation.

Correct AnswerverifiedShow Answer

The cosmic microwave background is:

Correct AnswerverifiedShow Answer

If the geometry of the universe can be shown to be Euclidean, then the density of the universe________ the critical density.

Correct AnswerverifiedShow Answer

With the exception of a few nearby objects, every galaxy in the universe is rapidly movingaway from ours; therefore, ________.

Correct AnswerverifiedShow Answer

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No, it is a measure of how fas...
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The study of large-s...
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Open universe will expand forever, witho...
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be open or...
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