Question 1

Within the boundaries of the constellations Coma and Virgo are found:

Accepted Answer

A) all the galaxies in the Local Group. 
B) the most distant known quasars. 
C) the largest nearby superclusters of galaxies. 
D) the closest red dwarfs to the Sun. 
E) the Large and Small Magellanic Clouds.

Question 2

The expansion of the universe means that stars in our Milky Way Galaxy are gettingincreasingly farther apart.

Accepted Answer

A) True 
 B)False

Question 3

The first clue to the significance of quasars came from the discovery that some of these"stars" were much stronger radio sources than any normal star.

Accepted Answer

A) True 
 B)False

Question 4

________ galaxies are essentially featureless; their light reveals evidence for the presence ofonly old red Main Sequence and red giant stars.

Accepted Answer

The answer of ________ galaxies are essentially featureless; their light...

Question 5

Orientation counts; if looking down the jets of an active core, we see a blazar.

Accepted Answer

A) True 
 B)False

Question 6

Which of these would be made up of only Population II stars?

Accepted Answer

A) elliptical galaxies 
B) Irr type I 
C) Irr type II 
D) barred spirals 
E) Seyfert spirals

Question 7

The look-back time of an object is directly related to its:

Accepted Answer

A) mass. 
B) distance. 
C) luminosity. 
D) size. 
E) composition.

Question 8

Most galaxies in the Local Group are:

Accepted Answer

A) dwarf spirals. 
B) small irregulars similar to the Magellanic Clouds. 
C) larger spirals than either the Milky Way or M-31 in Andromeda. 
D) dwarf ellipticals, similar to the companions of M-31. 
E) brown dwarfs, with even more dust than our own Galaxy.

Question 9

While examining the spectrum of a galaxy, you find all the hydrogen lines are shifted tolonger wavelengths. This galaxy is:

Accepted Answer

A) moving away from us. 
B) moving towards us. 
C) expanding explosively. 
D) blueshifted. 
E) not forming new stars.

Question 10

Most of the galaxies in the Local Group are:

Accepted Answer

A) big spirals like our Galaxy and $\text { M31. }$ 
B) small spirals like $\text { ?33 }$ nd the LMC. 
C) small irregulars like the Magellanic Clouds. 
D) active galaxies like Centaurus A. 
E) small ellipticals like the companions to M31 in Andromeda.

Question 11

What lines of evidence show that the Milky Way Galaxy is indeed a spiral galaxy?

Accepted Answer

The answer of What lines of evidence show that the...

Question 12

What is true of the lobes of a radio galaxy?

Accepted Answer

A) They are perpendicular to the galactic plane. 
B) They are hotter than the galactic core. 
C) They radiate primarily in the X-ray. 
D) They extend out along the galactic plane. 
E) They form close to the edge of the galaxy.

Question 13

How did Hubble use the cosmological redshift to determine distance?

Accepted Answer

The answer of How did Hubble use the cosmological redshift...

Question 14

A supernova that occurred 30,000 years ago in a galaxy 100,000 light-years away will beobserved on Earth:

Accepted Answer

A) 30,000 years from now. 
B) 70,000 years ago. 
C) 70,000 years from now. 
D) 100,000 years ago. 
E) 100,000 years from now.

Question 15

To which portion of the Milky Way are the Magellanic Clouds most similar? Why?

Accepted Answer

The answer of To which portion of the Milky Way...

Question 16

If the redshift is an accurate indication of the distance to that galaxy, then this is considered acosmological redshift.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following does the intensity of synchrotron radiation NOT depend on?

Accepted Answer

A) mass of the electron 
B) temperature 
C) speed of electrons 
D) frequency of radiation 
E) strength of the magnetic field

Question 18

According to the Hubble Law, a galaxy with a velocity of 25,000 km/s will be:

Accepted Answer

A) 100 million pcs away. 
B) 400 million pcs away. 
C) 700 million pcs away. 
D) 1000 million pcs away. 
E) less than 1 million pcs away.

Question 19

Most galaxies are members of some sort of cluster of galaxies.

Accepted Answer

A) True 
 B)False

Question 20

Irregular galaxies, although small, have large H II regions and much ongoing star formationfor their size.

Accepted Answer

A) True 
 B)False

Exam 24: Galaxies: Building Blocks of the Universe

Within the boundaries of the constellations Coma and Virgo are found:

The expansion of the universe means that stars in our Milky Way Galaxy are gettingincreasingly farther apart.

The first clue to the significance of quasars came from the discovery that some of these"stars" were much stronger radio sources than any normal star.

________ galaxies are essentially featureless; their light reveals evidence for the presence ofonly old red Main Sequence and red giant stars.

Orientation counts; if looking down the jets of an active core, we see a blazar.

Which of these would be made up of only Population II stars?

The look-back time of an object is directly related to its:

Most galaxies in the Local Group are:

While examining the spectrum of a galaxy, you find all the hydrogen lines are shifted tolonger wavelengths. This galaxy is:

Most of the galaxies in the Local Group are:

What lines of evidence show that the Milky Way Galaxy is indeed a spiral galaxy?

What is true of the lobes of a radio galaxy?

How did Hubble use the cosmological redshift to determine distance?

A supernova that occurred 30,000 years ago in a galaxy 100,000 light-years away will beobserved on Earth:

To which portion of the Milky Way are the Magellanic Clouds most similar? Why?

If the redshift is an accurate indication of the distance to that galaxy, then this is considered acosmological redshift.

Which of the following does the intensity of synchrotron radiation NOT depend on?

According to the Hubble Law, a galaxy with a velocity of 25,000 km/s will be:

Most galaxies are members of some sort of cluster of galaxies.

Irregular galaxies, although small, have large H II regions and much ongoing star formationfor their size.