Question 1

Which statement about stellar populations is correct?

Accepted Answer

A)  Population I stars are found in the disk and halo; Population II stars are found in the bulge. 
B)  Population I stars are found in the halo; Population II stars are found in the disk and bulge. 
C)  Population I stars are found in the disk; Population II stars are found in the bulge and halo. 
D)  Population II stars are found in the disk; Population I stars are found in the bulge and halo. 
E)  Population I stars are found in the bulge; Population II stars are found in the disk and halo. 
A)  Population I stars are found in the disk and halo; Population II stars are found in the bulge. 
B)  Population I stars are found in the halo; Population II stars are found in the disk and bulge. 
C)  Population I stars are found in the disk; Population II stars are found in the bulge and halo. 
D)  Population II stars are found in the disk; Population I stars are found in the bulge and halo. 
E)  Population I stars are found in the bulge; Population II stars are found in the disk and halo. C

Question 2

A "galactic fountain" is _____.

Accepted Answer

A)  a stream of gas and dust being pulled into a galaxy as it forms 
B)  a jet of high-speed superheated material thrown out of the accretion disk around a black hole 
C)  a partial spiral arm formed by the collision of molecular clouds 
D)  a bubble of hot, metal-rich gas ejected from the disk by a burst of supernova 
E)  a stream of gas made from a star that has been torn apart while falling into a supermassive black hole 
A)  a stream of gas and dust being pulled into a galaxy as it forms 
B)  a jet of high-speed superheated material thrown out of the accretion disk around a black hole 
C)  a partial spiral arm formed by the collision of molecular clouds 
D)  a bubble of hot, metal-rich gas ejected from the disk by a burst of supernova 
E)  a stream of gas made from a star that has been torn apart while falling into a supermassive black hole D

Question 3

Match between columns
                        Premises: billions of Population II stars
billions of Population II stars
billions of Population I stars

Accepted Answer

The Answer of galactic disk and galactic corona and galactic is...

Question 4

The best explanation for the activity at the center of the galaxy is a(n) ____.

Accepted Answer

A)  supercluster of O and B stars 
B)  black hole with a mass several thousand times the Sun's 
C)  giant atomic hydrogen cloud energized into a single, massive emission nebula 
D)  black hole with a mass several million times the Sun's 
E)  exotic object known as a "magnetar" 
A)  supercluster of O and B stars 
B)  black hole with a mass several thousand times the Sun's 
C)  giant atomic hydrogen cloud energized into a single, massive emission nebula 
D)  black hole with a mass several million times the Sun's 
E)  exotic object known as a "magnetar"

Question 5

____ are crucial in determining the distance to objects that are far away, but still in the Milky Way galaxy.

Accepted Answer

A)  RR Lyrae stars 
B)  Cepheid variable stars 
C)  O and B stars 
D)  Emission nebulae 
E)  Supernovae 
A)  RR Lyrae stars 
B)  Cepheid variable stars 
C)  O and B stars 
D)  Emission nebulae 
E)  Supernovae

Question 6

Why is it surprising that spiral arms are stable structures, lasting billions of years?

Accepted Answer

A)  Differential rotation should tear the arms apart. 
B)  Gas and dust clouds should run out of material to make young stars. 
C)  Supernova explosions should disrupt the arms. 
D)  Globular clusters are continuously passing through the arms. 
E)  Gravity should pull the arms down into the center of the galaxy. 
A)  Differential rotation should tear the arms apart. 
B)  Gas and dust clouds should run out of material to make young stars. 
C)  Supernova explosions should disrupt the arms. 
D)  Globular clusters are continuously passing through the arms. 
E)  Gravity should pull the arms down into the center of the galaxy.

Question 7

Stars that formed in the very early stages of our galaxy's formation have high amounts of "metals."

Accepted Answer

A) True 
 B)False

Question 8

Spiral arms are obvious-easily-seen features-because they contain ____.

Accepted Answer

A)  dense molecular clouds 
B)  atomic hydrogen clouds 
C)  sun-like stars 
D)  OB associations 
E)  supernovae 
A)  dense molecular clouds 
B)  atomic hydrogen clouds 
C)  sun-like stars 
D)  OB associations 
E)  supernovae

Question 9

Spiral density wave theory and self-sustaining star formation are ways to explain why ____.

Accepted Answer

A)  stars orbit the galaxy with different periods at different distances from the center 
B)  sun-like stars are evenly distributed through the disk of the galaxy 
C)  dark matter affects the orbit of stars outside the visible disk of the galaxy 
D)  molecular clouds are compressed forming young stars along spiral arms 
E)  the central bulge of the galaxy has a "bar" shape 
A)  stars orbit the galaxy with different periods at different distances from the center 
B)  sun-like stars are evenly distributed through the disk of the galaxy 
C)  dark matter affects the orbit of stars outside the visible disk of the galaxy 
D)  molecular clouds are compressed forming young stars along spiral arms 
E)  the central bulge of the galaxy has a "bar" shape

Question 10

The center of the galaxy has been studied extensively using visible light.

Accepted Answer

A) True 
 B)False

Question 11

How have astronomers determined the mass of the Milky Way's supermassive black hole?

Accepted Answer

Stars near the galactic center

Question 12

The first stars formed in the Universe were composed of 90% hydrogen, 10% helium, and very little else.

Accepted Answer

A) True 
 B)False

Question 13

An astronomer named _______________ used globular clusters to locate the center of the galaxy. (enter last name only)

Accepted Answer

The answer of An astronomer named _______________ used globular clusters...

Question 14

O and B stars are important spiral tracers.

Accepted Answer

A) True 
 B)False

Question 15

What is the correct ordering of galactic components using the new bottom-up hypothesis starting from oldest to youngest?

Accepted Answer

A)  galactic halo, average globular clusters, galactic disk 
B)  galactic halo, galactic disk, average globular clusters 
C)  average globular clusters, galactic halo, galactic disk 
D)  average globular clusters, galactic disk, galactic halo 
E)  galactic disk, average globular clusters, galactic halo. 
A)  galactic halo, average globular clusters, galactic disk 
B)  galactic halo, galactic disk, average globular clusters 
C)  average globular clusters, galactic halo, galactic disk 
D)  average globular clusters, galactic disk, galactic halo 
E)  galactic disk, average globular clusters, galactic halo.

Question 16

Harlow Shapley made the first accurate determination of the position of the center of the galaxy by studying ____.

Accepted Answer

A)  globular clusters 
B)  open clusters 
C)  emission nebulae 
D)  spiral tracers 
E)  stellar associations 
A)  globular clusters 
B)  open clusters 
C)  emission nebulae 
D)  spiral tracers 
E)  stellar associations

Question 17

Discuss the evidence that supports the theory that there is a supermassive black hole at the center of our galaxy.

Accepted Answer

There is an intense source of radio ener

Question 18

The Sun orbits the center of the galaxy about once every ____.

Accepted Answer

A)  200,000 years 
B)  2,000,000 years 
C)  20,000,000 years 
D)  200,000,000 years 
E)  2,000,000,000 years 
A)  200,000 years 
B)  2,000,000 years 
C)  20,000,000 years 
D)  200,000,000 years 
E)  2,000,000,000 years

Question 19

In the late 18th century, two astronomers, both with the last name of _______________, were the first to attempt to map the shape of the galaxy.

Accepted Answer

The answer of In the late 18th century, two astronomers,...

Question 20

Harlow Shapley used observations of globular clusters to determine the position of the center of the galaxy.

Accepted Answer

A) True 
 B)False

Exam 15: The Milky Way Galaxy

Which statement about stellar populations is correct?

A "galactic fountain" is _____.

The best explanation for the activity at the center of the galaxy is a(n) ____.

____ are crucial in determining the distance to objects that are far away, but still in the Milky Way galaxy.

Why is it surprising that spiral arms are stable structures, lasting billions of years?

Stars that formed in the very early stages of our galaxy's formation have high amounts of "metals."

Spiral arms are obvious-easily-seen features-because they contain ____.

Spiral density wave theory and self-sustaining star formation are ways to explain why ____.

The center of the galaxy has been studied extensively using visible light.

How have astronomers determined the mass of the Milky Way's supermassive black hole?

The first stars formed in the Universe were composed of 90% hydrogen, 10% helium, and very little else.

An astronomer named _______________ used globular clusters to locate the center of the galaxy. (enter last name only)

O and B stars are important spiral tracers.

What is the correct ordering of galactic components using the new bottom-up hypothesis starting from oldest to youngest?

Harlow Shapley made the first accurate determination of the position of the center of the galaxy by studying ____.

Discuss the evidence that supports the theory that there is a supermassive black hole at the center of our galaxy.

The Sun orbits the center of the galaxy about once every ____.

In the late 18th century, two astronomers, both with the last name of _______________, were the first to attempt to map the shape of the galaxy.

Harlow Shapley used observations of globular clusters to determine the position of the center of the galaxy.

Here and Now

A Users Guide to the Sky

Moon Phases and Eclipses

Origins of Modern Astronomy

Gravity

Light and Telescopes

Atoms and Spectra

The Sun

The Family of Stars

The Interstellar Medium

Formation and Structure of Stars

Stellar Evolution

Deaths of Stars

Neutron Stars and Black Holes

Galaxies

Supermassive Black Holes and Active Galaxies

Modern Cosmology

Origin of the Solar System and Extrasolar Planets

Earth the Active Planet

The Moon and Mercury

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Uranus Neptune Pluto and the Kuiper Belt

Meteorites Asteroids and Comets

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