Question 1

The first structures in the universe appear to have formed within

Accepted Answer

A)   the newly formed helium.
B)   the normal matter.
C)   the electromagnetic radiation.
D)   the dark matter.
E)   the dark energy.

Question 2

The concept that the direction of observation does not matter overall is

Accepted Answer

A)   relativity.
B)   homogeneity.
C)   universality.
D)   isotropy.
E)   geometry.

Question 3

The discovery of the cosmic microwave background was important because

Accepted Answer

A)   it established a firm center of the Universe.
B)   it was experimental verification of a prediction from the Big Bang theory.
C)   it proved that astronomy at radio wavelengths was possible.
D)   its detection was a major advance in microwave testing.
E)   it showed the universe must be closed, with more than the critical density here.

Question 4

Regular atoms did not show up in the universe until when?

Accepted Answer

A few hundred thousand years a...

Question 5

How does dark energy affect the expansion of the Universe?

Accepted Answer

Dark energy is accelerating th...

Question 6

The critical evidence for cosmic acceleration in 1998 came from two teams of astronomers, both observing

Accepted Answer

A)   hypernovae.
B)   gamma ray bursts.
C)   type I supernovae.
D)   type II supernovae.
E)   ages of globular clusters.

Question 7

The Big Bang formed

Accepted Answer

A)   only hydrogen.
B)   only helium.
C)   hydrogen and helium, but nothing else.
D)   all elements up to iron.
E)   all elements found in nature now.

Question 8

The Big Bang was an expansion of matter into empty space.

Accepted Answer

A) True 
 B)False

Question 9

Primordial nucleosynthesis refers to the Big Bang making all elements up to iron.

Accepted Answer

A) True 
 B)False

Question 10

Discounting the newly discovered role of dark energy, the universe we live in now is said to be ________ dominated.

Accepted Answer

The answer of Discounting the newly discovered role of dark...

Question 11

What is the Great Wall?

Accepted Answer

A)   It is a ridge on the Moon near the crater Birt.
B)   It is the distance beyond which astronomers cannot view any more galaxies or even quasars.
C)   It is a large sheet of galaxies.
D)   It is the time before the universe started expanding, about which we can never know anything.
E)   It is an enormous intergalactic cloud of dust and gas that hides more distant galaxies.

Question 12

What temperature has the Big Bang has cooled to by now?

Accepted Answer

A)   About 3,000 K
B)   5,800 K
C)   About 300 K
D)   Just over 2.7K
E)   1.4 K

Question 13

Before about 50,000 years after the Big Bang the universe was

Accepted Answer

A)   radiation dominated.
B)   quark dominated.
C)   lepton dominated.
D)   matter dominated.
E)   dark energy dominated.

Question 14

The ________ background radiation in fact far exceeds all the energy radiated by all the stars and galaxies that formed since then.

Accepted Answer

The answer of The ________ background radiation in fact far...

Question 15

The universe was two minutes old when ________ started to form from deuterium fusion.

Accepted Answer

The answer of The universe was two minutes old when...

Question 16

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

Accepted Answer

A) True 
 B)False

Question 17

The huge, dark, almost spherical regions between the superclusters of galaxies are called ________.

Accepted Answer

The answer of The huge, dark, almost spherical regions between...

Question 18

While a variety of factors can produce red shifts in the spectrum, the one associated with the expansion of the universe is called

Accepted Answer

A)   universal.
B)   cosmological.
C)   olberian.
D)   relativistic.
E)   the Zeeman Effect.

Question 19

The ________ is the observational evidence that the whole universe was once extremely hot and dense, as called for in the Big Bang, but has now expanded and redshifted this energy to much longer wavelengths.

Accepted Answer

microwave ...

Question 20

How does the energy of the cosmic microwave background compare to the energy radiated by all the stars and galaxies that ever existed?

Accepted Answer

A)   They are very close to being equal.
B)   73% cosmic background, 27% starlight
C)   About ten times more from the Big Bang than from stars and galaxies
D)   The starlight now dominates the background, as your eyes show clearly.
E)   We have no way of comparing matter and energy this way.

Exam 15: Cosmology and the Universe

The discovery of the cosmic microwave background was important because

Correct AnswerverifiedShow Answer

The Big Bang was an expansion of matter into empty space.

Correct AnswerverifiedShow Answer

How does dark energy affect the expansion of the Universe?

Correct AnswerverifiedDark energy is accelerating th...View AnswerShow Answer

Regular atoms did not show up in the universe until when?

Correct AnswerverifiedA few hundred thousand years a...View AnswerShow Answer

The universe was two minutes old when ________ started to form from deuterium fusion.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Before about 50,000 years after the Big Bang the universe was

Correct AnswerverifiedShow Answer

The first structures in the universe appear to have formed within

Correct AnswerverifiedShow Answer

What is the Great Wall?

Correct AnswerverifiedShow Answer

The concept that the direction of observation does not matter overall is

Correct AnswerverifiedShow Answer

Discounting the newly discovered role of dark energy, the universe we live in now is said to be ________ dominated.

Correct AnswerverifiedShow Answer

The Big Bang formed

Correct AnswerverifiedShow Answer

The ________ background radiation in fact far exceeds all the energy radiated by all the stars and galaxies that formed since then.

Correct AnswerverifiedShow Answer

What temperature has the Big Bang has cooled to by now?

Correct AnswerverifiedShow Answer

The critical evidence for cosmic acceleration in 1998 came from two teams of astronomers, both observing

Correct AnswerverifiedShow Answer

The huge, dark, almost spherical regions between the superclusters of galaxies are called ________.

Correct AnswerverifiedShow Answer

While a variety of factors can produce red shifts in the spectrum, the one associated with the expansion of the universe is called

Correct AnswerverifiedShow Answer

Primordial nucleosynthesis refers to the Big Bang making all elements up to iron.

Correct AnswerverifiedShow Answer

How does the energy of the cosmic microwave background compare to the energy radiated by all the stars and galaxies that ever existed?

Correct AnswerverifiedShow Answer

The ________ is the observational evidence that the whole universe was once extremely hot and dense, as called for in the Big Bang, but has now expanded and redshifted this energy to much longer wavelengths.

Correct Answerverifiedmicrowave ...View AnswerShow Answer

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Dark energy is accelerating th...
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A few hundred thousand years a...
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microwave ...
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