Question 1

Synchrotron radiation occurs when high-speed electrons move through a magnetic field.

Accepted Answer

A) True 
 B)False

Question 2

The lowest-mass stars cannot become giants because

Accepted Answer

A)  they do not contain helium. 
B)  they rotate too slowly. 
C)  their convective interiors prevent the development of an inert helium core surrounded by unprocessed hydrogen. 
D)  they contain strong magnetic fields. 
E)  they never use up their hydrogen. 
A)  they do not contain helium. 
B)  they rotate too slowly. 
C)  their convective interiors prevent the development of an inert helium core surrounded by unprocessed hydrogen. 
D)  they contain strong magnetic fields. 
E)  they never use up their hydrogen.

Question 3

A(n) ____________________ is the sudden expulsion of the outer layers of a moderate mass star that has a dormant carbon core.

Accepted Answer

The answer of A(n) ____________________ is the sudden expulsion of...

Question 4

A Type Ia supernova is believed to occur when

Accepted Answer

A)  the core of a massive star collapses. 
B)  hydrogen detonation occurs. 
C)  a white dwarf exceeds the Chandrasekhar limit. 
D)  the cores of massive stars collapse. 
E)  neutrinos in a massive star become degenerate and form a shock wave that explodes the star. 
A)  the core of a massive star collapses. 
B)  hydrogen detonation occurs. 
C)  a white dwarf exceeds the Chandrasekhar limit. 
D)  the cores of massive stars collapse. 
E)  neutrinos in a massive star become degenerate and form a shock wave that explodes the star.

Question 5

What is the difference between a planetary nebula and a supernova remnant?

Accepted Answer

A planetary nebula is the result of an a

Question 6

No known white dwarf has a mass greater than the Chandrasekhar limit.

Accepted Answer

A) True 
 B)False

Question 7

Stars with masses between 0.4-   and 4-

Accepted Answer

A)  undergo thermonuclear fusion of hydrogen and helium, but never get hot enough to ignite carbon. 
B)  undergo thermonuclear fusion of hydrogen, but never get hot enough to ignite helium. 
C)  produce type I supernovae after they exhaust their nuclear fuels. 
D)  produce type II supernovae after they exhaust their nuclear fuels. 
E)  undergo carbon detonation. 
A)  undergo thermonuclear fusion of hydrogen and helium, but never get hot enough to ignite carbon. 
B)  undergo thermonuclear fusion of hydrogen, but never get hot enough to ignite helium. 
C)  produce type I supernovae after they exhaust their nuclear fuels. 
D)  produce type II supernovae after they exhaust their nuclear fuels. 
E)  undergo carbon detonation.

Question 8

In A.D. 1054, Chinese astronomers observed the appearance of a new star, whose location is now occupied by

Accepted Answer

A)  a globular cluster. 
B)  a planetary nebulae. 
C)  a white dwarf. 
D)  a young massive star. 
E)  a supernova remnant. 
A)  a globular cluster. 
B)  a planetary nebulae. 
C)  a white dwarf. 
D)  a young massive star. 
E)  a supernova remnant.

Question 9

Explain the sequence of fusion shell formation in massive stars and thus the generation of nested shells.

Accepted Answer

First, massive stars consume the hydroge

Question 10

Star clusters are important to our study of the lives of high-mass versus low-mass stars because

Accepted Answer

A)  stars in each cluster all formed at about the same time all with the same mass. 
B)  the Sun was once a member of a globular cluster. 
C)  stars in each cluster all formed at about the same time but with differing masses. 
D)  stars in each cluster all formed at different times with differing masses. 
E)  All of the other choices are correct. 
A)  stars in each cluster all formed at about the same time all with the same mass. 
B)  the Sun was once a member of a globular cluster. 
C)  stars in each cluster all formed at about the same time but with differing masses. 
D)  stars in each cluster all formed at different times with differing masses. 
E)  All of the other choices are correct.

Question 11

Synchrotron radiation is produced

Accepted Answer

A)  in planetary nebulae. 
B)  by red dwarfs. 
C)  in massive stars as their iron core collapses. 
D)  in supernova. 
E)  by neutrinos. 
A)  in planetary nebulae. 
B)  by red dwarfs. 
C)  in massive stars as their iron core collapses. 
D)  in supernova. 
E)  by neutrinos.

Question 12

Which of the following nuclear fuels does a twenty-solar-mass star NOT fuse over the course of its entire evolution?

Accepted Answer

A)  hydrogen 
B)  carbon 
C)  nitrogen 
D)  oxygen 
E)  iron 
A)  hydrogen 
B)  carbon 
C)  nitrogen 
D)  oxygen 
E)  iron

Question 13

The diagram below shows a light curve from a supernova. How many days after maximum light did it take for the supernova to decrease in brightness by a factor of 100?
​  
​

Accepted Answer

A)  less than 50 
B)  50 
C)  150 
D)  250 
E)  more than 250 
A)  less than 50 
B)  50 
C)  150 
D)  250 
E)  more than 250

Question 14

What properties of degenerate matter are important to the structure of stars? Why?

Accepted Answer

Degenerate matter is when a gas is so de

Question 15

A white dwarf whose red giant companion dumps hydrogen onto it may

Accepted Answer

A)  show no effect. 
B)  explode recurrently as a nova. 
C)  blow up as a type I supernova. 
D)  explode recurrently as a nova or blow up as a type Ia supernova. 
A)  show no effect. 
B)  explode recurrently as a nova. 
C)  blow up as a type I supernova. 
D)  explode recurrently as a nova or blow up as a type Ia supernova.

Question 16

A(n) _________ is a collection of 105 to 106 stars in a region 10 to 30 pc in diameter. The stars in the collection tend to be more than 109 years old and mostly yellow and red stars.

Accepted Answer

A)  Herbig-Haro object 
B)  globular cluster 
C)  open cluster 
D)  giant cluster 
E)  supernova 
A)  Herbig-Haro object 
B)  globular cluster 
C)  open cluster 
D)  giant cluster 
E)  supernova

Question 17

The helium core flash occurs in very high mass stars.

Accepted Answer

A) True 
 B)False

Question 18

The triple-alpha process

Accepted Answer

A)  controls the pulsations in Cepheid variable stars. 
B)  is the nuclear fusion of hydrogen to helium in massive stars. 
C)  is the process that produces the neutrinos we receive from the Sun. 
D)  requires a temperature of about 5,000,000 K to operate. 
E)  occurs during helium flash. 
A)  controls the pulsations in Cepheid variable stars. 
B)  is the nuclear fusion of hydrogen to helium in massive stars. 
C)  is the process that produces the neutrinos we receive from the Sun. 
D)  requires a temperature of about 5,000,000 K to operate. 
E)  occurs during helium flash.

Question 19

Star clusters are important to our study of stars because

Accepted Answer

A)  all stars formed in star clusters. 
B)  the Sun was once a member of a globular cluster. 
C)  they give us a method to test the our theories and models of stellar evolution. 
D)  they are the only objects that contain Cepheid variables. 
E)  All of the other choices are correct. 
A)  all stars formed in star clusters. 
B)  the Sun was once a member of a globular cluster. 
C)  they give us a method to test the our theories and models of stellar evolution. 
D)  they are the only objects that contain Cepheid variables. 
E)  All of the other choices are correct.

Question 20

A white dwarf converts __________________ energy into _________________ energy.

Accepted Answer

A)  nuclear, gravitational 
B)  chemical, potential 
C)  kinetic, potential 
D)  gravitational, thermal 
A)  nuclear, gravitational 
B)  chemical, potential 
C)  kinetic, potential 
D)  gravitational, thermal

Synchrotron radiation occurs when high-speed electrons move through a magnetic field.

The lowest-mass stars cannot become giants because

A(n) ____________________ is the sudden expulsion of the outer layers of a moderate mass star that has a dormant carbon core.

A Type Ia supernova is believed to occur when

What is the difference between a planetary nebula and a supernova remnant?

No known white dwarf has a mass greater than the Chandrasekhar limit.

Stars with masses between 0.4- and 4-

In A.D. 1054, Chinese astronomers observed the appearance of a new star, whose location is now occupied by

Explain the sequence of fusion shell formation in massive stars and thus the generation of nested shells.

Star clusters are important to our study of the lives of high-mass versus low-mass stars because

Synchrotron radiation is produced

Which of the following nuclear fuels does a twenty-solar-mass star NOT fuse over the course of its entire evolution?

The diagram below shows a light curve from a supernova. How many days after maximum light did it take for the supernova to decrease in brightness by a factor of 100?

What properties of degenerate matter are important to the structure of stars? Why?

A white dwarf whose red giant companion dumps hydrogen onto it may

A(n) _________ is a collection of 10⁵ to 10⁶ stars in a region 10 to 30 pc in diameter. The stars in the collection tend to be more than 10⁹ years old and mostly yellow and red stars.

The helium core flash occurs in very high mass stars.

The triple-alpha process

Star clusters are important to our study of stars because

A white dwarf converts __ energy into _ energy.

Here and Now

A Users Guide to the Sky

Cycles of the Sun and Moon

The Origin of Modern Astronomy

Light and Telescopes

Atoms and Spectra

The Sun

The Family of Stars

The Formation and Structure of Stars

Neutron Stars and Black Holes

The Milky Way Galaxy

Galaxies: Normal and Active

Modern Cosmology

Origin of the Solar System and Extrasolar Planets

Earth and Moon: Bases for Comparative Planetology

Mercury, Venus, and Mars

The Outer Solar System

Meteorites, Asteroids, and Comets

Astrobiology: Life on Other Worlds

Filters

Exam 10: The Deaths of Stars

Synchrotron radiation occurs when high-speed electrons move through a magnetic field.

The lowest-mass stars cannot become giants because

A(n) ____________________ is the sudden expulsion of the outer layers of a moderate mass star that has a dormant carbon core.

A Type Ia supernova is believed to occur when

What is the difference between a planetary nebula and a supernova remnant?

No known white dwarf has a mass greater than the Chandrasekhar limit.

Stars with masses between 0.4- and 4-

In A.D. 1054, Chinese astronomers observed the appearance of a new star, whose location is now occupied by

Explain the sequence of fusion shell formation in massive stars and thus the generation of nested shells.

Star clusters are important to our study of the lives of high-mass versus low-mass stars because

Synchrotron radiation is produced

Which of the following nuclear fuels does a twenty-solar-mass star NOT fuse over the course of its entire evolution?

The diagram below shows a light curve from a supernova. How many days after maximum light did it take for the supernova to decrease in brightness by a factor of 100? ​ ​

What properties of degenerate matter are important to the structure of stars? Why?

A white dwarf whose red giant companion dumps hydrogen onto it may

A(n) _________ is a collection of 105 to 106 stars in a region 10 to 30 pc in diameter. The stars in the collection tend to be more than 109 years old and mostly yellow and red stars.

The helium core flash occurs in very high mass stars.

The triple-alpha process

Star clusters are important to our study of stars because

A white dwarf converts __________________ energy into _________________ energy.

Here and Now

A Users Guide to the Sky

Cycles of the Sun and Moon

The Origin of Modern Astronomy

Light and Telescopes

Atoms and Spectra

The Sun

The Family of Stars

The Formation and Structure of Stars

Neutron Stars and Black Holes

The Milky Way Galaxy

Galaxies: Normal and Active

Modern Cosmology

Origin of the Solar System and Extrasolar Planets

Earth and Moon: Bases for Comparative Planetology

Mercury, Venus, and Mars

The Outer Solar System

Meteorites, Asteroids, and Comets

Astrobiology: Life on Other Worlds

Filters

The diagram below shows a light curve from a supernova. How many days after maximum light did it take for the supernova to decrease in brightness by a factor of 100?

A(n) _________ is a collection of 10⁵ to 10⁶ stars in a region 10 to 30 pc in diameter. The stars in the collection tend to be more than 10⁹ years old and mostly yellow and red stars.

A white dwarf converts __ energy into _ energy.