Question 1

The universal accelerating force could NOT be considered:

Accepted Answer

A)  antigravity.
B)  Einstein's cosmological constant.
C)  dark energy.
D)  vacuum pressure.
E)  dark matter.

Question 2

A Hubble Constant of $\mathrm { H } = 70 \mathrm {~km} / \mathrm { sec } / \mathrm { Mpc }$ uggests a maximum age for the universe of________.

Accepted Answer

about 14 b...

Question 3

If the density of the universe is greater 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 4

Where did the Big Bang occur?

Accepted Answer

It involved the entire universe, which w...

Question 5

If the universe has a density greater than $\Omega _ { 0 } = 1$ t is considered high density.

Accepted Answer

A) True 
 B)False

Question 6

Does the universe have an edge or a center?

Accepted Answer

Not according to the...

Question 7

The two different kinds of surveys that have given astronomers great insight into the structureand expanse of the universe are:

Accepted Answer

A)  pie slice and pencil beam.
B)  pie slice and redshift survey.
C)  pencil beam and deep imaging.
D)  pie slice and local surveys.
E)  deep space survey and pencil beam.

Question 8

The center of the universe:

Accepted Answer

A)  is a supermassive black hole.
B)  is the Sun.
C)  is Earth.
D)  is where the Big Bang happened.
E)  does not exist anywhere in space.

Question 9

Homogeneity and isotropy, taken as assumptions regarding the structure and evolution of theuniverse, are known as:

Accepted Answer

A)  Olbers's Paradox.
B)  Hubble's law.
C)  Wien's law.
D)  the Cosmological Principle.
E)  the Grand Unified Theory.

Question 10

Most astronomers agree to interpret ________ Law to mean that the present day universe isexpanding.

Accepted Answer

The answer of Most astronomers agree to interpret ________ Law...

Question 11

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

Accepted Answer

microwave ...

Question 12

In the critical density universe now proposed, the ratio of dark energy to matter is about:

Accepted Answer

A)  1 to 100.
B)  1 to 1.
C)  3 to 1.
D)  10 to 1.
E)  1 to 5.

Question 13

At present the universe is expanding, but we are not certain if this expansion will continueforever, come to a stop, or if the universe will ultimately collapse back into itself. Whatobservational tests are possible to test among these three possibilities?

Accepted Answer

The possibilities can be tested by measu...

Question 14

What is the meaning of a "closed" universe?

Accepted Answer

A)  The universe will expand forever.
B)  The universe will someday stop expanding and start to collapse.
C)  The universe will stop expanding in an infinite amount of time.
D)  The universe is in a steady state.
E)  The universe will disappear into a white hole in time.

Question 15

________ is the concept that the universe looks the same in all directions.

Accepted Answer

The answer of ________ is the concept that the universe...

Question 16

All the known matter and energy, both normal and dark, only gives us an $\Omega _ { 0 }$ of about .3.

Accepted Answer

A) True 
 B)False

Question 17

The photons from the microwave background have not interacted with matter since theuniverse was how old?

Accepted Answer

A)  4,000,000,000 years old
B)  4,000,000 years old
C)  400,000 years old
D)  4,000 years old
E)  4 seconds old

Question 18

The cosmological principle is the ultimate extension of the ________ principle; we are not atthe center of the solar system, the galaxy, or the universe.

Accepted Answer

The answer of The cosmological principle is the ultimate extension...

Question 19

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 20

The open universe would require $\Omega _ { 0 }$ be less than zero.

Accepted Answer

A) True 
 B)False

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

The universal accelerating force could NOT be considered:

Correct AnswerverifiedShow Answer

The discovery of the cosmic microwave background was important because:

Correct AnswerverifiedShow Answer

The photons from the microwave background have not interacted with matter since theuniverse was how old?

Correct AnswerverifiedShow Answer

The two different kinds of surveys that have given astronomers great insight into the structureand expanse of the universe are:

Correct AnswerverifiedShow Answer

A Hubble Constant of H=70 km/sec/Mpc\mathrm { H } = 70 \mathrm {~km} / \mathrm { sec } / \mathrm { Mpc }H=70 km/sec/Mpc uggests a maximum age for the universe of________.

Correct Answerverifiedabout 14 b...View AnswerShow Answer

The open universe would require Ω0\Omega _ { 0 }Ω0​ be less than zero.

Correct AnswerverifiedShow Answer

The cosmological principle is the ultimate extension of the ________ principle; we are not atthe center of the solar system, the galaxy, or the universe.

Correct AnswerverifiedShow Answer

The center of the universe:

Correct AnswerverifiedShow Answer

At present the universe is expanding, but we are not certain if this expansion will continueforever, come to a stop, or if the universe will ultimately collapse back into itself. Whatobservational tests are possible to test among these three possibilities?

Correct AnswerverifiedThe possibilities can be tested by measu...View AnswerShow Answer

Homogeneity and isotropy, taken as assumptions regarding the structure and evolution of theuniverse, are known as:

Correct AnswerverifiedShow Answer

________ is the concept that the universe looks the same in all directions.

Correct AnswerverifiedShow Answer

What is the meaning of a "closed" universe?

Correct AnswerverifiedShow Answer

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

Correct Answerverifiedmicrowave ...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

All the known matter and energy, both normal and dark, only gives us an Ω0\Omega _ { 0 }Ω0​ of about .3.

Correct AnswerverifiedShow Answer

Where did the Big Bang occur?

Correct AnswerverifiedIt involved the entire universe, which w...View AnswerShow Answer

If the universe has a density greater than Ω0=1\Omega _ { 0 } = 1Ω0​=1 t is considered high density.

Correct AnswerverifiedShow Answer

Does the universe have an edge or a center?

Correct AnswerverifiedNot according to the...View AnswerShow Answer

In the critical density universe now proposed, the ratio of dark energy to matter is about:

Correct AnswerverifiedShow Answer

Most astronomers agree to interpret ________ Law to mean that the present day universe isexpanding.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

A Hubble Constant of $\mathrm { H } = 70 \mathrm {~km} / \mathrm { sec } / \mathrm { Mpc }$ uggests a maximum age for the universe of________.

Correct Answer
verified
about 14 b...
View Answer

The open universe would require $\Omega _ { 0 }$ be less than zero.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The possibilities can be tested by measu...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
microwave ...
View Answer

Correct Answer
verified

All the known matter and energy, both normal and dark, only gives us an $\Omega _ { 0 }$ of about .3.

Correct Answer
verified

Correct Answer
verified
It involved the entire universe, which w...
View Answer

If the universe has a density greater than $\Omega _ { 0 } = 1$ t is considered high density.

Correct Answer
verified

Correct Answer
verified
Not according to the...
View Answer

Correct Answer
verified

Correct Answer
verified