Question 1

Normal galaxies in the present never went through an active galaxy phase.

Accepted Answer

A) True 
 B)False

Question 2

The luminosity of a Seyfert galaxy varies with a regular period of months or years.

Accepted Answer

A) True 
 B)False

Question 3

Matter flowing into a black hole cools until it is accelerated into a jet.

Accepted Answer

A) True 
 B)False

Question 4

Active galactic nuclei were first found through observations in the ____ wavelength band.

Accepted Answer

A)  visible 
B)  infrared 
C)  X-ray 
D)  radio 
E)  ultraviolet 
A)  visible 
B)  infrared 
C)  X-ray 
D)  radio 
E)  ultraviolet

Question 5

Quasars are isolated supermassive black holes, and not associated with galaxies.

Accepted Answer

A) True 
 B)False

Question 6

Ultraluminous radio sources associated with small visible-light objects are called _______________.

Accepted Answer

The answer of Ultraluminous radio sources associated with small visible-light...

Question 7

Quasars have a(n) ____.

Accepted Answer

A)  extremely high blueshift 
B)  moderate blueshift 
C)  undetectable Doppler shift 
D)  moderate redshift 
E)  extremely high redshift 
A)  extremely high blueshift 
B)  moderate blueshift 
C)  undetectable Doppler shift 
D)  moderate redshift 
E)  extremely high redshift

Question 8

A galaxy's supermassive black hole represents about ____ for elliptical galaxies.

Accepted Answer

A)  half a percent of the mass of the disk 
B)  five percent of the mass of the central bulge 
C)  half a percent of the mass of the central bulge 
D)  five percent of the mass of the disk 
E)  half a percent of the dark matter in the corona 
A)  half a percent of the mass of the disk 
B)  five percent of the mass of the central bulge 
C)  half a percent of the mass of the central bulge 
D)  five percent of the mass of the disk 
E)  half a percent of the dark matter in the corona

Question 9

Supermassive black holes have weaker gravity than stellar-mass black holes, producing slower spins for the infalling matter.

Accepted Answer

A) True 
 B)False

Question 10

The unified model of active galactic nuclei focuses on differences caused by the age of the central black hole.

Accepted Answer

A) True 
 B)False

Question 11

A supermassive black hole that is erupting____.

Accepted Answer

A)  will consume all gas and dust in the galaxy 
B)  will heat the gas in the cluster until it all escapes 
C)  is fed by the intergalactic gas of the cluster 
D)  may push its accretion disk away and choke off the eruption 
E)  will push other galaxies away from its parent galaxy 
A)  will consume all gas and dust in the galaxy 
B)  will heat the gas in the cluster until it all escapes 
C)  is fed by the intergalactic gas of the cluster 
D)  may push its accretion disk away and choke off the eruption 
E)  will push other galaxies away from its parent galaxy

Question 12

The broad emission lines of Seyfert galaxies imply high gas speeds in the nucleus.

Accepted Answer

A) True 
 B)False

Question 13

The size of a galaxy's central black hole is proportional to the mass of its disk.

Accepted Answer

A) True 
 B)False

Question 14

Most supermassive black holes are dormant.

Accepted Answer

A) True 
 B)False

Question 15

Active galaxies are believed to be the product of collisions and interactions because ____.

Accepted Answer

A)  they are always seen in contact with another galaxy 
B)  the transfer of matter would explain the black hole eruption 
C)  the collision of individual stars would explain the black hole eruption 
D)  central bulges are formed by collisions 
E)  supermassive black holes are necessary for galactic collisions 
A)  they are always seen in contact with another galaxy 
B)  the transfer of matter would explain the black hole eruption 
C)  the collision of individual stars would explain the black hole eruption 
D)  central bulges are formed by collisions 
E)  supermassive black holes are necessary for galactic collisions

Question 16

Seyfert galaxies____.

Accepted Answer

A)  often have unique shapes spectra suggesting fast-moving, hot gas 
B)  have no gas and dust in their spiral arms 
C)  are associated with pairs of radio sources 
D)  have visible jets of matter coming from their cores 
E)  are always isolated galaxies 
A)  often have unique shapes spectra suggesting fast-moving, hot gas 
B)  have no gas and dust in their spiral arms 
C)  are associated with pairs of radio sources 
D)  have visible jets of matter coming from their cores 
E)  are always isolated galaxies

Question 17

The Doppler effect in the spectra of quasars show very high _______________.

Accepted Answer

red shifts

Question 18

The formation process for supermassive black holes is linked with the formation of galactic ____.

Accepted Answer

A)  disks 
B)  clusters 
C)  central bulges 
D)  coronae 
E)  halos 
A)  disks 
B)  clusters 
C)  central bulges 
D)  coronae 
E)  halos

Question 19

What is the cause of the lobes in a double-lobed radio galaxy?

Accepted Answer

Jets from a central

Question 20

Supermassive black holes erupt in ____.

Accepted Answer

A)  any type of galaxy, and at random times 
B)  elliptical galaxies only, when the last of their gas and dust is consumed 
C)  galaxies that have been part of a collision or merger 
D)  spiral galaxies only, during a burst of star formation 
E)  irregular galaxies 
A)  any type of galaxy, and at random times 
B)  elliptical galaxies only, when the last of their gas and dust is consumed 
C)  galaxies that have been part of a collision or merger 
D)  spiral galaxies only, during a burst of star formation 
E)  irregular galaxies

Exam 17: Supermassive Black Holes and Active Galaxies

Normal galaxies in the present never went through an active galaxy phase.

The luminosity of a Seyfert galaxy varies with a regular period of months or years.

Matter flowing into a black hole cools until it is accelerated into a jet.

Active galactic nuclei were first found through observations in the ____ wavelength band.

Quasars are isolated supermassive black holes, and not associated with galaxies.

Ultraluminous radio sources associated with small visible-light objects are called _______________.

Quasars have a(n) ____.

A galaxy's supermassive black hole represents about ____ for elliptical galaxies.

Supermassive black holes have weaker gravity than stellar-mass black holes, producing slower spins for the infalling matter.

The unified model of active galactic nuclei focuses on differences caused by the age of the central black hole.

A supermassive black hole that is erupting____.

The broad emission lines of Seyfert galaxies imply high gas speeds in the nucleus.

The size of a galaxy's central black hole is proportional to the mass of its disk.

Most supermassive black holes are dormant.

Active galaxies are believed to be the product of collisions and interactions because ____.

Seyfert galaxies____.

The Doppler effect in the spectra of quasars show very high _______________.

The formation process for supermassive black holes is linked with the formation of galactic ____.

What is the cause of the lobes in a double-lobed radio galaxy?

Supermassive black holes erupt in ____.

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

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

Filters