Question 1

Gravitational lensing can be used to detect the presence of dark matter.

Accepted Answer

A) True 
 B)False

Question 2

Spiral galaxies are mostly found ____.

Accepted Answer

A)  in poor clusters where their disk structure will not be disrupted 
B)  isolated in space with only small dwarf galaxies nearby 
C)  in the center of rich clusters where tidal forces can support their arm structure 
D)  in clusters with hot intergalactic gas helping support star formation 
E)  orbiting giant elliptical galaxies in a galactic binary system 
A)  in poor clusters where their disk structure will not be disrupted 
B)  isolated in space with only small dwarf galaxies nearby 
C)  in the center of rich clusters where tidal forces can support their arm structure 
D)  in clusters with hot intergalactic gas helping support star formation 
E)  orbiting giant elliptical galaxies in a galactic binary system

Question 3

Which types of galaxies would contain very little gas and dust?

Accepted Answer

A)  elliptical galaxies only 
B)  elliptical and spiral galaxies 
C)  spiral galaxies only 
D)  elliptical and irregular galaxies 
E)  spiral and irregular galaxies 
A)  elliptical galaxies only 
B)  elliptical and spiral galaxies 
C)  spiral galaxies only 
D)  elliptical and irregular galaxies 
E)  spiral and irregular galaxies

Question 4

Gravitational _______________ can be used to detect dark matter.

Accepted Answer

The answer of Gravitational _______________ can be used to detect...

Question 5

Spiral and irregular galaxies have active star formation.

Accepted Answer

A) True 
 B)False

Question 6

Which types of galaxies lack an ordered structure of stellar orbits?

Accepted Answer

A)  elliptical galaxies only 
B)  spiral galaxies only 
C)  irregular galaxies only 
D)  elliptical and irregular galaxies 
E)  spiral and irregular galaxies 
A)  elliptical galaxies only 
B)  spiral galaxies only 
C)  irregular galaxies only 
D)  elliptical and irregular galaxies 
E)  spiral and irregular galaxies

Question 7

A standard candle is an object with a known luminosity.

Accepted Answer

A) True 
 B)False

Question 8

The Milky Way galaxy has collided with several other large galaxies in its lifetime.

Accepted Answer

A) True 
 B)False

Question 9

The rotation curve of a galaxy is important in determining the galaxy's ____.

Accepted Answer

A)  mass 
B)  age 
C)  luminosity 
D)  type 
E)  diameter 
A)  mass 
B)  age 
C)  luminosity 
D)  type 
E)  diameter

Question 10

The Hubble law is one of the most important relations in modern astronomy because it ____.

Accepted Answer

A)  allows astronomers to measure the distance to very distant galaxies using only their spectrum 
B)  explains the difference in the types of galaxies seen in different directions 
C)  relates the rotation curve of a galaxy to the amount of dark matter it contains 
D)  connects the mass of a spiral galaxy's bulge to the size of its central black hole 
E)  determines the mass of a cluster using the rotation period of the galaxies it contains 
A)  allows astronomers to measure the distance to very distant galaxies using only their spectrum 
B)  explains the difference in the types of galaxies seen in different directions 
C)  relates the rotation curve of a galaxy to the amount of dark matter it contains 
D)  connects the mass of a spiral galaxy's bulge to the size of its central black hole 
E)  determines the mass of a cluster using the rotation period of the galaxies it contains

Question 11

Spiral structures and steady star formation depend on ____.

Accepted Answer

A)  gentle gravitational interactions with other galaxies 
B)  galactic cannibalism 
C)  major collisions with other galaxies 
D)  hot intergalactic gas flow 
E)  supermassive central black holes 
A)  gentle gravitational interactions with other galaxies 
B)  galactic cannibalism 
C)  major collisions with other galaxies 
D)  hot intergalactic gas flow 
E)  supermassive central black holes

Question 12

Because t he Hubble constant has a value of 70 km/s/Mpc, a galaxy 100 Mpc away would have a recession velocity of ____.

Accepted Answer

A)  0.7 km/s 
B)  1.43 km/s 
C)  30 km/s 
D)  170 km/s 
E)  7,000 km/s 
A)  0.7 km/s 
B)  1.43 km/s 
C)  30 km/s 
D)  170 km/s 
E)  7,000 km/s

Question 13

The mass of a galaxy's central black hole is related to the mass of the galactic bulge. This implies that ____.

Accepted Answer

A)  central black holes formed when the galaxy bulges formed 
B)  central black holes have grown during the galaxy's lifetime as the galactic bulge has grown 
C)  galactic bulges shrink over time as mass is consumed by the central black hole 
D)  central black holes cause the formation of galactic bulges 
E)  black holes are only present in spiral galaxies 
A)  central black holes formed when the galaxy bulges formed 
B)  central black holes have grown during the galaxy's lifetime as the galactic bulge has grown 
C)  galactic bulges shrink over time as mass is consumed by the central black hole 
D)  central black holes cause the formation of galactic bulges 
E)  black holes are only present in spiral galaxies

Question 14

"Starburst" events are a common outcome of galactic collisions.

Accepted Answer

A) True 
 B)False

Question 15

The structure of most galaxies is most apparent using near-infrared images that show the locations of ____.

Accepted Answer

A)  dense molecular clouds 
B)  spiral tracers 
C)  atomic hydrogen clouds 
D)  cool, low-luminosity stars 
E)  hot, high-luminosity stars 
A)  dense molecular clouds 
B)  spiral tracers 
C)  atomic hydrogen clouds 
D)  cool, low-luminosity stars 
E)  hot, high-luminosity stars

Exam 16: Galaxies

Gravitational lensing can be used to detect the presence of dark matter.

Spiral galaxies are mostly found ____.

Which types of galaxies would contain very little gas and dust?

Gravitational _______________ can be used to detect dark matter.

Spiral and irregular galaxies have active star formation.

Which types of galaxies lack an ordered structure of stellar orbits?

A standard candle is an object with a known luminosity.

The Milky Way galaxy has collided with several other large galaxies in its lifetime.

The rotation curve of a galaxy is important in determining the galaxy's ____.

The Hubble law is one of the most important relations in modern astronomy because it ____.

Spiral structures and steady star formation depend on ____.

Because t he Hubble constant has a value of 70 km/s/Mpc, a galaxy 100 Mpc away would have a recession velocity of ____.

The mass of a galaxy's central black hole is related to the mass of the galactic bulge. This implies that ____.

"Starburst" events are a common outcome of galactic collisions.

The structure of most galaxies is most apparent using near-infrared images that show the locations of ____.

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

The Milky Way Galaxy

Supermassive Black Holes and Active Galaxies

Modern Cosmology

Origin of the Solar System and Extrasolar Planets

Earth the Active Planet

The Moon and Mercury

Venus and Mars

Jupiter and Saturn

Uranus Neptune Pluto and the Kuiper Belt

Meteorites Asteroids and Comets

Astrobiology

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