Question 1

The first galaxies formed:

Accepted Answer

A)  because of merging black holes. 
B)  from merging clouds of gas. 
C)  out of large spinning clouds of gas and dust, collapsing under their own gravity. 
D)  within dark matter halos. 
A)  because of merging black holes. 
B)  from merging clouds of gas. 
C)  out of large spinning clouds of gas and dust, collapsing under their own gravity. 
D)  within dark matter halos.

Question 2

Which of the following CANNOT be dark matter?

Accepted Answer

A)  axions 
B)  positrons 
C)  photinos 
D)  neutrinos 
A)  axions 
B)  positrons 
C)  photinos 
D)  neutrinos

Question 3

What does the large-scale structure of the universe look most like?

Accepted Answer

A)  a sponge with many large holes 
B)  a loaf of wheat bread with many tiny holes 
C)  a plate of flat noodles 
D)  a jar of marbles 
A)  a sponge with many large holes 
B)  a loaf of wheat bread with many tiny holes 
C)  a plate of flat noodles 
D)  a jar of marbles

Question 4

During which era will the last star form?

Accepted Answer

A)  Dark Era 
B)  Degenerate Era 
C)  Stelliferous Era 
D)  Primordial Era 
A)  Dark Era 
B)  Degenerate Era 
C)  Stelliferous Era 
D)  Primordial Era

Question 5

Describe how elliptical galaxies form.

Accepted Answer

Elliptical galaxies

Question 6

Axions and photinos are examples of:

Accepted Answer

A)  cold dark matter. 
B)  hot dark matter. 
C)  neutrinos. 
D)  normal matter. 
A)  cold dark matter. 
B)  hot dark matter. 
C)  neutrinos. 
D)  normal matter.

Question 7

Galaxy clusters have been observed to be rich in hot,X-ray-emitting gas.What is keeping the gas in the cluster?

Accepted Answer

A)  dark matter 
B)  the gravitational pull of the galaxies 
C)  the electromagnetic radiation emitted by the galaxies 
D)  the low speed of the hot gas 
A)  dark matter 
B)  the gravitational pull of the galaxies 
C)  the electromagnetic radiation emitted by the galaxies 
D)  the low speed of the hot gas

Question 8

Stars of the first generation were:

Accepted Answer

A)  less massive than today's average star. 
B)  more massive than today's average star. 
C)  similar to today's average star. 
D)  We have no ability to predict. 
A)  less massive than today's average star. 
B)  more massive than today's average star. 
C)  similar to today's average star. 
D)  We have no ability to predict.

Question 9

Which era corresponds to the final stage of the universe?

Accepted Answer

A)  Dark Era 
B)  Degenerate Era 
C)  Stelliferous Era 
D)  Primordial Era 
A)  Dark Era 
B)  Degenerate Era 
C)  Stelliferous Era 
D)  Primordial Era

Question 10

How do astronomers explain the role of mergers in the formation of elliptical galaxies?

Accepted Answer

Elliptical galaxies most likely formed a

Question 11

We expect the kinds of galaxies that we see at a redshift of 4 (that is,when the universe was much younger)to be:

Accepted Answer

A)  much like what we see today. 
B)  smaller and much more irregular looking than today. 
C)  smaller versions of what we see today. 
D)  far more numerous but with fewer spiral galaxies. 
A)  much like what we see today. 
B)  smaller and much more irregular looking than today. 
C)  smaller versions of what we see today. 
D)  far more numerous but with fewer spiral galaxies.

Question 12

What process is most responsible for shaping the large-scale structure of the universe?

Accepted Answer

A)  supernovae from the first generation of stars 
B)  gravity 
C)  matter/antimatter annihilation 
D)  magnetic fields 
A)  supernovae from the first generation of stars 
B)  gravity 
C)  matter/antimatter annihilation 
D)  magnetic fields

Question 13

Which of the following provided the gravity to form galaxy fragments in the early universe?

Accepted Answer

A)  cold dark matter halos 
B)  galaxy clusters 
C)  hot dark matter halos 
D)  large clouds of gas and dust 
A)  cold dark matter halos 
B)  galaxy clusters 
C)  hot dark matter halos 
D)  large clouds of gas and dust

Question 14

Which part of our Milky Way Galaxy has the youngest stars?

Accepted Answer

A)  bulge 
B)  disk 
C)  halo 
D)  cannot measure relative ages of these structures 
A)  bulge 
B)  disk 
C)  halo 
D)  cannot measure relative ages of these structures

Question 15

Which of the following makes up a significant amount of hot dark matter?

Accepted Answer

A)  axions 
B)  neutrinos 
C)  photinos 
D)  photons 
A)  axions 
B)  neutrinos 
C)  photinos 
D)  photons

Question 16

Which is NOT an ingredient needed to build a cosmological simulation of large-scale structure formation?

Accepted Answer

A)  the spectrum of density fluctuations that quantum mechanics imprints on the early universe 
B)  the density of dark matter and luminous matter in the universe 
C)  the grand unified theory 
D)  the density of dark energy in the universe 
A)  the spectrum of density fluctuations that quantum mechanics imprints on the early universe 
B)  the density of dark matter and luminous matter in the universe 
C)  the grand unified theory 
D)  the density of dark energy in the universe

Question 17

What is the evidence that galaxies form via hierarchical merging?

Accepted Answer

(1)Images of distant versus ne

Question 18

Our Milky Way Galaxy is a member of:

Accepted Answer

A)  the Local Group. 
B)  the Virgo Cluster. 
C)  the Virgo Supercluster. 
D)  all of the above 
A)  the Local Group. 
B)  the Virgo Cluster. 
C)  the Virgo Supercluster. 
D)  all of the above

Question 19

Put the following eras in the history of the evolution of the universe in their proper order from the earliest to the latest: Black Hole Era,Dark Era,Degenerate Era,Primordial Era,Stelliferous Era.

Accepted Answer

From first to last:

Question 20

How much of the total mass of the universe is made up of hot dark matter?

Accepted Answer

A)  5 percent 
B)  25 percent 
C)  45 percent 
D)  90 percent 
A)  5 percent 
B)  25 percent 
C)  45 percent 
D)  90 percent

The first galaxies formed:

Which of the following CANNOT be dark matter?

What does the large-scale structure of the universe look most like?

During which era will the last star form?

Describe how elliptical galaxies form.

Axions and photinos are examples of:

Galaxy clusters have been observed to be rich in hot,X-ray-emitting gas.What is keeping the gas in the cluster?

Stars of the first generation were:

Which era corresponds to the final stage of the universe?

How do astronomers explain the role of mergers in the formation of elliptical galaxies?

We expect the kinds of galaxies that we see at a redshift of 4 (that is,when the universe was much younger)to be:

What process is most responsible for shaping the large-scale structure of the universe?

Which of the following provided the gravity to form galaxy fragments in the early universe?

Which part of our Milky Way Galaxy has the youngest stars?

Which of the following makes up a significant amount of hot dark matter?

Which is NOT an ingredient needed to build a cosmological simulation of large-scale structure formation?

What is the evidence that galaxies form via hierarchical merging?

Our Milky Way Galaxy is a member of:

Put the following eras in the history of the evolution of the universe in their proper order from the earliest to the latest: Black Hole Era,Dark Era,Degenerate Era,Primordial Era,Stelliferous Era.

How much of the total mass of the universe is made up of hot dark matter?

Thinking Like an Astronomer

Patterns in the Skymotions of Earth and the Moon

Laws of Motion

Light and Telescopes

The Formation of Stars and Planets

Terrestrial Worlds in the Inner Solar System

Atmospheres of Venus, earth, and Mars

The Giant Planets

Small Bodies of the Solar System

Measuring the Stars

Our Star: the Sun

Evolution of Low-Mass Stars

Evolution of High-Mass Stars

Measuring Galaxies

Our Galaxy: the Milky Way

The Evolution of the Universe

Life in the Universe

Filters

Exam 17: Formation of Structure

The first galaxies formed:

Which of the following CANNOT be dark matter?

What does the large-scale structure of the universe look most like?

During which era will the last star form?

Describe how elliptical galaxies form.

Axions and photinos are examples of:

Galaxy clusters have been observed to be rich in hot,X-ray-emitting gas.What is keeping the gas in the cluster?

Stars of the first generation were:

Which era corresponds to the final stage of the universe?

How do astronomers explain the role of mergers in the formation of elliptical galaxies?

We expect the kinds of galaxies that we see at a redshift of 4 (that is,when the universe was much younger)to be:

What process is most responsible for shaping the large-scale structure of the universe?

Which of the following provided the gravity to form galaxy fragments in the early universe?

Which part of our Milky Way Galaxy has the youngest stars?

Which of the following makes up a significant amount of hot dark matter?

Which is NOT an ingredient needed to build a cosmological simulation of large-scale structure formation?

What is the evidence that galaxies form via hierarchical merging?

Our Milky Way Galaxy is a member of:

Put the following eras in the history of the evolution of the universe in their proper order from the earliest to the latest: Black Hole Era,Dark Era,Degenerate Era,Primordial Era,Stelliferous Era.

How much of the total mass of the universe is made up of hot dark matter?

Thinking Like an Astronomer

Patterns in the Skymotions of Earth and the Moon

Laws of Motion

Light and Telescopes

The Formation of Stars and Planets

Terrestrial Worlds in the Inner Solar System

Atmospheres of Venus, earth, and Mars

The Giant Planets

Small Bodies of the Solar System

Measuring the Stars

Our Star: the Sun

Evolution of Low-Mass Stars

Evolution of High-Mass Stars

Measuring Galaxies

Our Galaxy: the Milky Way

The Evolution of the Universe

Life in the Universe

Filters