Question 1

Magnetic fields in the Milky Way are concentrated in the disk because:

Accepted Answer

A)  halo stars are incapable of producing strong magnetic fields. 
B)  the fields are tied to the charged particles in dense molecular clouds. 
C)  gravity forces them to sink to the center of the disk. 
D)  supernovae explosions continually force them toward the middle of the disk. 
A)  halo stars are incapable of producing strong magnetic fields. 
B)  the fields are tied to the charged particles in dense molecular clouds. 
C)  gravity forces them to sink to the center of the disk. 
D)  supernovae explosions continually force them toward the middle of the disk.

Question 2

What type of standard candle is used to determine distances to globular clusters?

Accepted Answer

A)  RR Lyrae stars 
B)  Cepheid variable stars 
C)  T Tauri stars 
D)  Type Ia supernovae 
A)  RR Lyrae stars 
B)  Cepheid variable stars 
C)  T Tauri stars 
D)  Type Ia supernovae

Question 3

Globular clusters,when compared to open clusters,generally:

Accepted Answer

A)  are located closer to the center of the Milky Way. 
B)  are younger in age. 
C)  have fewer amounts of heavy elements. 
D)  all of the above 
A)  are located closer to the center of the Milky Way. 
B)  are younger in age. 
C)  have fewer amounts of heavy elements. 
D)  all of the above

Question 4

The Milky Way Galaxy is a(n)________ galaxy.

Accepted Answer

A)  irregular 
B)  elliptical 
C)  barred spiral 
D)  lenticular 
A)  irregular 
B)  elliptical 
C)  barred spiral 
D)  lenticular

Question 5

What is the evidence that the Milky Way must have formed when the gas within a huge "clump" of dark matter collapsed?

Accepted Answer

A)  the number of nearby dwarf galaxies 
B)  the properties of globular clusters 
C)  the supermassive black hole at the center of the Milky Way 
D)  all of the above 
A)  the number of nearby dwarf galaxies 
B)  the properties of globular clusters 
C)  the supermassive black hole at the center of the Milky Way 
D)  all of the above

Question 6

Which of the following statements is NOT a property of an open cluster?

Accepted Answer

A)  contains hundreds to thousands of stars 
B)  includes young stars 
C)  loosely gravitationally bound 
D)  tightly gravitationally bound 
A)  contains hundreds to thousands of stars 
B)  includes young stars 
C)  loosely gravitationally bound 
D)  tightly gravitationally bound

Question 7

What observed property of the Milky Way suggests that it contains a large amount of matter NOT in the form of stars?

Accepted Answer

A)  the rotation curve 
B)  the velocities of the open star clusters 
C)  the number and shape of the spiral arms 
D)  the thickness of the disk 
A)  the rotation curve 
B)  the velocities of the open star clusters 
C)  the number and shape of the spiral arms 
D)  the thickness of the disk

Question 8

Which of the following regions of the electromagnetic spectrum is best used to study structure in the Milky Way?

Accepted Answer

A)  gamma rays 
B)  radio 
C)  ultraviolet 
D)  X-rays 
A)  gamma rays 
B)  radio 
C)  ultraviolet 
D)  X-rays

Question 9

Where in the Milky Way would we look to find lots of gas and dust?

Accepted Answer

A)  disk 
B)  globular clusters 
C)  halo 
D)  The gas and dust is uniformly distributed in the Milky Way. 
A)  disk 
B)  globular clusters 
C)  halo 
D)  The gas and dust is uniformly distributed in the Milky Way.

Question 10

How does the H-R diagram of a globular star cluster show that its age is very old? Provide a sketch of an H-R diagram for a globular cluster.

Accepted Answer

There are not any very hot sta

Question 11

Why is the supermassive black hole in the center of our galaxy not an AGN right now? Could it be active in the future? Why or why not?

Accepted Answer

It is not an AGN right now because it cu

Question 12

Cosmic rays are:

Accepted Answer

A)  photons with even higher energy than gamma rays. 
B)  high-velocity particles produced in novae. 
C)  primarily protons with very high energies. 
D)  synchrotron emission from strong magnetic fields. 
A)  photons with even higher energy than gamma rays. 
B)  high-velocity particles produced in novae. 
C)  primarily protons with very high energies. 
D)  synchrotron emission from strong magnetic fields.

Question 13

Which of the following methods is used to measure the velocity and direction of motion of gas in the galaxy?

Accepted Answer

A)  Doppler effect 
B)  main-sequence fitting on an H-R diagram 
C)  parallax 
D)  transit method 
A)  Doppler effect 
B)  main-sequence fitting on an H-R diagram 
C)  parallax 
D)  transit method

Magnetic fields in the Milky Way are concentrated in the disk because:

What type of standard candle is used to determine distances to globular clusters?

Globular clusters,when compared to open clusters,generally:

The Milky Way Galaxy is a(n)________ galaxy.

What is the evidence that the Milky Way must have formed when the gas within a huge "clump" of dark matter collapsed?

Which of the following statements is NOT a property of an open cluster?

What observed property of the Milky Way suggests that it contains a large amount of matter NOT in the form of stars?

Which of the following regions of the electromagnetic spectrum is best used to study structure in the Milky Way?

Where in the Milky Way would we look to find lots of gas and dust?

How does the H-R diagram of a globular star cluster show that its age is very old? Provide a sketch of an H-R diagram for a globular cluster.

Why is the supermassive black hole in the center of our galaxy not an AGN right now? Could it be active in the future? Why or why not?

Cosmic rays are:

Which of the following methods is used to measure the velocity and direction of motion of gas in the galaxy?

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

The Evolution of the Universe

Formation of Structure

Life in the Universe

Filters

Exam 15: Our Galaxy: the Milky Way

Magnetic fields in the Milky Way are concentrated in the disk because:

What type of standard candle is used to determine distances to globular clusters?

Globular clusters,when compared to open clusters,generally:

The Milky Way Galaxy is a(n)________ galaxy.

What is the evidence that the Milky Way must have formed when the gas within a huge "clump" of dark matter collapsed?

Which of the following statements is NOT a property of an open cluster?

What observed property of the Milky Way suggests that it contains a large amount of matter NOT in the form of stars?

Which of the following regions of the electromagnetic spectrum is best used to study structure in the Milky Way?

Where in the Milky Way would we look to find lots of gas and dust?

How does the H-R diagram of a globular star cluster show that its age is very old? Provide a sketch of an H-R diagram for a globular cluster.

Why is the supermassive black hole in the center of our galaxy not an AGN right now? Could it be active in the future? Why or why not?

Cosmic rays are:

Which of the following methods is used to measure the velocity and direction of motion of gas in the galaxy?

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

The Evolution of the Universe

Formation of Structure

Life in the Universe

Filters