Question 1

The mass of a single galaxy might be found by

Accepted Answer

A)   the direction to the galaxy in the sky
B)   the rotation curve method.
C)   the color of planets in our Solar System
D)   any of these methods.
E)   none of these methods

Question 2

Based on the galaxies found in the Local Group of galaxies,the most common type of galaxy in the universe is expected to be

Accepted Answer

A)   the spiral galaxies.
B)   the barred spiral galaxies.
C)   the dwarf elliptical galaxies.
D)   the irregular galaxies.
E)   the giant elliptical galaxies.

Question 3

The look-back time is numerically equal to the distance to a galaxy in light-years.

Accepted Answer

A) True 
 B)False

Question 4

____ is an irregular galaxy that is believed to have collided with the Milky Way galaxy's halo and is expected to merge with the Milky Way in the future.

Accepted Answer

A)   The Andromeda galaxy
B)   The Small Magellanic Cloud
C)   M87
D)   The Virgo cluster
E)   The Whirlpool Galaxy

Question 5

Super massive black holes in galaxies

Accepted Answer

A)   are found in their centers
B)   have masses proportional to the galaxy's bulge mass.
C)   cause stars near them to move at high speeds.
D)   all of the above

Question 6

The Andromeda spiral galaxy is almost edge-on to us.Astronomers have detected the orbital motion of this and other such galaxies' disk material by

Accepted Answer

A)   using Hubble's law.
B)   the big bang theory of 3° Kelvin radiation.
C)   the steady state theory.
D)   measuring Doppler shifts of different parts of the disk.
E)   watching the stars travel around the nucleus back to where they started.

Question 7

Until recently,most astronomers thought elliptical galaxies were shaped like oblate spheroids.

Accepted Answer

A) True 
 B)False

Question 8

Elliptical galaxies contain more gas,dust,and young stars than do Sa galaxies.

Accepted Answer

A) True 
 B)False

Question 9

Label each galaxy in the tuning fork diagram below.Record your labels on the lines provided above or below the galaxy.

Accepted Answer

The answer of Label each galaxy in the tuning fork...

Question 10

____ galaxies contain large clouds of gas and dust,both young and old stars,but have no obvious spiral arms or nucleus.

Accepted Answer

A)   Irregular
B)   S0
C)   E7
D)   Sa
E)   E0

Question 11

The rotation curve method can be applied only to pairs of galaxies orbiting each other.

Accepted Answer

A) True 
 B)False

Question 12

Galactic cannibalism refers to

Accepted Answer

A)   binary galaxies.
B)   the merging of galaxies.
C)   galaxies drawing in gas from the intergalactic medium.
D)   the destruction of a galaxy's globular clusters by the galaxies nucleus.
E)   none of the above

Question 13

The Milky Way galaxy is part of

Accepted Answer

A)   the Virgo cluster.
B)   the Large Magellanic Cloud.
C)   the Small Magellanic cloud.
D)   the Local Group.
E)   a rich cluster.

Question 14

Due to the extremely rapid orbital velocities of material near the center of many galaxies,these galaxies are believed to contain ____________________ at their centers.

Accepted Answer

a supermas...

Question 15

If a galaxy has a radial velocity of 8000 km/sec and the Hubble constant is 70 km/sec/Mpc,what is the distance to this galaxy?

Accepted Answer

A)   8.75´103 Mpc
B)   2.4´109 Mpc
C)   5.6´105 Mpc
D)   114 Mpc
E)   8.75´10-3 Mpc

Exam 16: Galaxies

Super massive black holes in galaxies

Correct Answer
verified

Due to the extremely rapid orbital velocities of material near the center of many galaxies,these galaxies are believed to contain ____________________ at their centers.

Correct Answer
verified
a supermas...
View Answer

____ is an irregular galaxy that is believed to have collided with the Milky Way galaxy's halo and is expected to merge with the Milky Way in the future.

Correct Answer
verified

The rotation curve method can be applied only to pairs of galaxies orbiting each other.

Correct Answer
verified

Elliptical galaxies contain more gas,dust,and young stars than do Sa galaxies.

Correct Answer
verified

Until recently,most astronomers thought elliptical galaxies were shaped like oblate spheroids.

Correct Answer
verified

The Milky Way galaxy is part of

Correct Answer
verified

Galactic cannibalism refers to

Correct Answer
verified

Based on the galaxies found in the Local Group of galaxies,the most common type of galaxy in the universe is expected to be

Correct Answer
verified

____ galaxies contain large clouds of gas and dust,both young and old stars,but have no obvious spiral arms or nucleus.

Correct Answer
verified

Label each galaxy in the tuning fork diagram below.Record your labels on the lines provided above or below the galaxy.

Correct Answer
verified

The look-back time is numerically equal to the distance to a galaxy in light-years.

Correct Answer
verified

If a galaxy has a radial velocity of 8000 km/sec and the Hubble constant is 70 km/sec/Mpc,what is the distance to this galaxy?

Correct Answer
verified

The Andromeda spiral galaxy is almost edge-on to us.Astronomers have detected the orbital motion of this and other such galaxies' disk material by

Correct Answer
verified

The mass of a single galaxy might be found by

Correct Answer
verified

Exam 16: Galaxies

Super massive black holes in galaxies

Correct AnswerverifiedShow Answer

Due to the extremely rapid orbital velocities of material near the center of many galaxies,these galaxies are believed to contain ____________________ at their centers.

Correct Answerverifieda supermas...View AnswerShow Answer

____ is an irregular galaxy that is believed to have collided with the Milky Way galaxy's halo and is expected to merge with the Milky Way in the future.

Correct AnswerverifiedShow Answer

The rotation curve method can be applied only to pairs of galaxies orbiting each other.

Correct AnswerverifiedShow Answer

Elliptical galaxies contain more gas,dust,and young stars than do Sa galaxies.

Correct AnswerverifiedShow Answer

Until recently,most astronomers thought elliptical galaxies were shaped like oblate spheroids.

Correct AnswerverifiedShow Answer

The Milky Way galaxy is part of

Correct AnswerverifiedShow Answer

Galactic cannibalism refers to

Correct AnswerverifiedShow Answer

Based on the galaxies found in the Local Group of galaxies,the most common type of galaxy in the universe is expected to be

Correct AnswerverifiedShow Answer

____ galaxies contain large clouds of gas and dust,both young and old stars,but have no obvious spiral arms or nucleus.

Correct AnswerverifiedShow Answer

Label each galaxy in the tuning fork diagram below.Record your labels on the lines provided above or below the galaxy.

Correct AnswerverifiedShow Answer

The look-back time is numerically equal to the distance to a galaxy in light-years.

Correct AnswerverifiedShow Answer

If a galaxy has a radial velocity of 8000 km/sec and the Hubble constant is 70 km/sec/Mpc,what is the distance to this galaxy?

Correct AnswerverifiedShow Answer

The Andromeda spiral galaxy is almost edge-on to us.Astronomers have detected the orbital motion of this and other such galaxies' disk material by

Correct AnswerverifiedShow Answer

The mass of a single galaxy might be found by

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified
a supermas...
View Answer

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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