Question 1

Radio lobes are held together by their magnetic fields.

Accepted Answer

A) True 
 B)False

Question 2

What factor below is the most important when trying to classify a galaxy as spiral or elliptical?

Accepted Answer

A) the amount of dust and gas in the galaxy 
B) the galaxy's location 
C) the number of satellite galaxies 
D) the mass of the galaxy 
A) the amount of dust and gas in the galaxy 
B) the galaxy's location 
C) the number of satellite galaxies 
D) the mass of the galaxy

Question 3

Poor clusters of galaxies often contain an excess of E and S0 galaxies.

Accepted Answer

A) True 
 B)False

Question 4

Seyfert galaxies are spiral galaxies with active cores.

Accepted Answer

A) True 
 B)False

Question 5

What inflates the lobes of a radio galaxy?

Accepted Answer

A) jets of excited gas flowing from the central galaxy 
B) jets of high energy sound waves flowing from the central galaxy 
C) a disk of ionized material that orbits very near a supermassive black hole 
D) dark clouds of very cold gas and dust 
A) jets of excited gas flowing from the central galaxy 
B) jets of high energy sound waves flowing from the central galaxy 
C) a disk of ionized material that orbits very near a supermassive black hole 
D) dark clouds of very cold gas and dust

Question 6

How does the use of H II regions to find a galaxy's distance differ from the use of Cepheid variables?

Accepted Answer

The use of H II regions and Cepheid vari

Question 7

Mathematical models indicate that one type of galaxy is produced by high speed collisions in which a smaller galaxy passes through a larger galaxy almost perpendicular to the disk of the larger galaxy.What is this type of galaxy called?

Accepted Answer

A) ring 
B) spiral 
C) antenna 
D) irregular 
A) ring 
B) spiral 
C) antenna 
D) irregular

Question 8

Propose a hypothesis to explain why rich galaxy clusters have a larger proportion of elliptical and S0 galaxies than other galaxy clusters.

Accepted Answer

One hypothesis to explain why rich galax

Question 9

How would you use the Hubble Law to measure the distance to a galaxy?

Accepted Answer

A) Measure its apparent recession velocity and divide by the age of the universe. 
B) Measure its Cepheid variables and multiply by the Hubble constant. 
C) Measure its apparent recession velocity and divide by the Hubble constant. 
D) Measure its apparent recession velocity and add it to the Hubble constant. 
A) Measure its apparent recession velocity and divide by the age of the universe. 
B) Measure its Cepheid variables and multiply by the Hubble constant. 
C) Measure its apparent recession velocity and divide by the Hubble constant. 
D) Measure its apparent recession velocity and add it to the Hubble constant.

Question 10

How might the mass of a single galaxy be found?

Accepted Answer

A) by the double galaxy method 
B) by the rotation curve method 
C) by the cluster method 
D) by the main-sequence fitting method 
A) by the double galaxy method 
B) by the rotation curve method 
C) by the cluster method 
D) by the main-sequence fitting method

Question 11

The Milky Way galaxy is not a radio galaxy;it emits no radio radiation.

Accepted Answer

A) True 
 B)False

Question 12

According to the unified model of active galactic nuclei,what is observed if our line of sight is parallel to the plane of the dense disk of an active galactic nucleus?

Accepted Answer

A) no spectral emission lines 
B) broad spectral lines 
C) narrow spectral lines 
D) a thin accretion disk 
A) no spectral emission lines 
B) broad spectral lines 
C) narrow spectral lines 
D) a thin accretion disk

Question 13

What kind of radiation is produced by the radio lobes that are on each side of some radio galaxies,and also by the jets from them?

Accepted Answer

A) mainly 21-cm radiation 
B) mainly synchrotron radiation 
C) mainly black body radiation 
D) mainly emission lines due to hydrogen 
A) mainly 21-cm radiation 
B) mainly synchrotron radiation 
C) mainly black body radiation 
D) mainly emission lines due to hydrogen

Question 14

Which of the following best describes starburst galaxies?

Accepted Answer

A) They contain a large number of very young stars, but very little evidence of gas clouds. 
B) They contain a large number of very old stars and almost no gas or dust. 
C) They are often associated with galaxy collisions. 
D) They are commonly found in rich clusters. 
A) They contain a large number of very young stars, but very little evidence of gas clouds. 
B) They contain a large number of very old stars and almost no gas or dust. 
C) They are often associated with galaxy collisions. 
D) They are commonly found in rich clusters.

Question 15

What observational evidence do we have that eruptions in the centres of galaxies involve magnetic fields?

Accepted Answer

Observational evidence for the involveme

Question 16

If H (the Hubble constant)equals 70 km/sec/Mpc,then approximately how far away is a galaxy with a radial velocity of 2100 km/sec?

Accepted Answer

A) 30 Mpc 
B) 2030 Mpc 
C) 2170 Mpc 
D) 147,000 Mpc 
A) 30 Mpc 
B) 2030 Mpc 
C) 2170 Mpc 
D) 147,000 Mpc

Question 17

Which of the following has the largest diameter?

Accepted Answer

A) the Milky Way galaxy 
B) the Large Magellanic Cloud 
C) the Local Group 
D) the Andromeda galaxy 
A) the Milky Way galaxy 
B) the Large Magellanic Cloud 
C) the Local Group 
D) the Andromeda galaxy

Question 18

Why are supermassive black holes believed to be located at the centre of many galaxies?

Accepted Answer

A) because the rotation curve of the galaxy indicates that 90% of the galaxy is dark matter 
B) because the orbital motion of material near the centre is very fast and indicates a very massive core 
C) because the shape of the bulge in all spiral galaxies can only be supported by a supermassive black hole 
D) because the spiral structure requires a black hole to maintain the spiral arms 
A) because the rotation curve of the galaxy indicates that 90% of the galaxy is dark matter 
B) because the orbital motion of material near the centre is very fast and indicates a very massive core 
C) because the shape of the bulge in all spiral galaxies can only be supported by a supermassive black hole 
D) because the spiral structure requires a black hole to maintain the spiral arms

Question 19

A quasar's redshift and apparent magnitude lead us to believe that it is very luminous.What assumptions do we make in reaching this conclusion?

Accepted Answer

To conclude that a quasar is very lumino

Question 20

Which of the following is the Milky Way galaxy a part of?

Accepted Answer

A) the Virgo cluster 
B) the Large Magellanic Cloud 
C) the Small Magellanic Cloud 
D) the Local Group 
A) the Virgo cluster 
B) the Large Magellanic Cloud 
C) the Small Magellanic Cloud 
D) the Local Group

Radio lobes are held together by their magnetic fields.

What factor below is the most important when trying to classify a galaxy as spiral or elliptical?

Poor clusters of galaxies often contain an excess of E and S0 galaxies.

Seyfert galaxies are spiral galaxies with active cores.

What inflates the lobes of a radio galaxy?

How does the use of H II regions to find a galaxy's distance differ from the use of Cepheid variables?

Mathematical models indicate that one type of galaxy is produced by high speed collisions in which a smaller galaxy passes through a larger galaxy almost perpendicular to the disk of the larger galaxy.What is this type of galaxy called?

Propose a hypothesis to explain why rich galaxy clusters have a larger proportion of elliptical and S0 galaxies than other galaxy clusters.

How would you use the Hubble Law to measure the distance to a galaxy?

How might the mass of a single galaxy be found?

The Milky Way galaxy is not a radio galaxy;it emits no radio radiation.

According to the unified model of active galactic nuclei,what is observed if our line of sight is parallel to the plane of the dense disk of an active galactic nucleus?

What kind of radiation is produced by the radio lobes that are on each side of some radio galaxies,and also by the jets from them?

Which of the following best describes starburst galaxies?

What observational evidence do we have that eruptions in the centres of galaxies involve magnetic fields?

If H (the Hubble constant)equals 70 km/sec/Mpc,then approximately how far away is a galaxy with a radial velocity of 2100 km/sec?

Which of the following has the largest diameter?

Why are supermassive black holes believed to be located at the centre of many galaxies?

A quasar's redshift and apparent magnitude lead us to believe that it is very luminous.What assumptions do we make in reaching this conclusion?

Which of the following is the Milky Way galaxy a part of?

The Scale of the Cosmos

User's Guide to the Sky

The Origin of Modern Astronomy

Astronomical Telescopes and Instruments

Sun Light and Sun Atoms

The Family of Stars

The Structure and Formation of Stars

The Deaths of Stars

The Milky Way Galaxy

Cosmology in the 21st Century

The Origin of the Solar System

Comparative Planetology of the Terrestrial Planets

Comparative Planetology of the Jovian Planets

Life on Other Worlds

Filters

Exam 10: Galaxies

Radio lobes are held together by their magnetic fields.

What factor below is the most important when trying to classify a galaxy as spiral or elliptical?

Poor clusters of galaxies often contain an excess of E and S0 galaxies.

Seyfert galaxies are spiral galaxies with active cores.

What inflates the lobes of a radio galaxy?

How does the use of H II regions to find a galaxy's distance differ from the use of Cepheid variables?

Mathematical models indicate that one type of galaxy is produced by high speed collisions in which a smaller galaxy passes through a larger galaxy almost perpendicular to the disk of the larger galaxy.What is this type of galaxy called?

Propose a hypothesis to explain why rich galaxy clusters have a larger proportion of elliptical and S0 galaxies than other galaxy clusters.

How would you use the Hubble Law to measure the distance to a galaxy?

How might the mass of a single galaxy be found?

The Milky Way galaxy is not a radio galaxy;it emits no radio radiation.

According to the unified model of active galactic nuclei,what is observed if our line of sight is parallel to the plane of the dense disk of an active galactic nucleus?

What kind of radiation is produced by the radio lobes that are on each side of some radio galaxies,and also by the jets from them?

Which of the following best describes starburst galaxies?

What observational evidence do we have that eruptions in the centres of galaxies involve magnetic fields?

If H (the Hubble constant)equals 70 km/sec/Mpc,then approximately how far away is a galaxy with a radial velocity of 2100 km/sec?

Which of the following has the largest diameter?

Why are supermassive black holes believed to be located at the centre of many galaxies?

A quasar's redshift and apparent magnitude lead us to believe that it is very luminous.What assumptions do we make in reaching this conclusion?

Which of the following is the Milky Way galaxy a part of?

The Scale of the Cosmos

User's Guide to the Sky

The Origin of Modern Astronomy

Astronomical Telescopes and Instruments

Sun Light and Sun Atoms

The Family of Stars

The Structure and Formation of Stars

The Deaths of Stars

The Milky Way Galaxy

Cosmology in the 21st Century

The Origin of the Solar System

Comparative Planetology of the Terrestrial Planets

Comparative Planetology of the Jovian Planets

Life on Other Worlds

Filters