Question 1

Why do higher-mass stars live shorter lives on the main sequence than lower-mass stars

Accepted Answer

A) Higher-mass stars burn through their nuclear fuel faster. 
B) Lower-mass stars don't get their energy from that same nuclear fusion source as higher-mass stars. 
C) Higher-mass stars have less hydrogen fuel to burn. 
D) Lower-mass stars spend a longer time evolving to the main sequence. 
E) All of the other choices are false. 
A) Higher-mass stars burn through their nuclear fuel faster. 
B) Lower-mass stars don't get their energy from that same nuclear fusion source as higher-mass stars. 
C) Higher-mass stars have less hydrogen fuel to burn. 
D) Lower-mass stars spend a longer time evolving to the main sequence. 
E) All of the other choices are false.

Question 2

About how long will a 0.5-   star spend on the main sequence

Accepted Answer

A) 6 billion years 
B) 62 billion years 
C) 620 million years 
D) 6 million years 
E) 600 thousand years 
A) 6 billion years 
B) 62 billion years 
C) 620 million years 
D) 6 million years 
E) 600 thousand years

Question 3

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 4

In the visual wavelength image, a/an ______________ cluster is shown.

Accepted Answer

A) open 
B) globular 
C) Trapezium 
D) Helix nebula 
A) open 
B) globular 
C) Trapezium 
D) Helix nebula

Question 5

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 6

Because more massive stars have more gravitational energy, they can fuse heavier nuclear fuels.

Accepted Answer

A) True 
 B)False

Question 7

Stars in a star cluster

Accepted Answer

A) all have the same age. 
B) all have the same chemical composition. 
C) all have the same luminosity. 
D) all of the above. 
E) all have the same age and all have the same chemical composition. 
A) all have the same age. 
B) all have the same chemical composition. 
C) all have the same luminosity. 
D) all of the above. 
E) all have the same age and all have the same chemical composition.

Question 8

What is the difference between a supernova and a nova

Accepted Answer

A nova is an eruption on the s

Question 9

We know that the central object in a planetary nebula has a surface temperature of at least ____ because the nebula contains large amounts of ionized hydrogen.

Accepted Answer

A) 50 K 
B) 100 K 
C) 500 K 
D) 5,000 K 
E) 25,000 K 
A) 50 K 
B) 100 K 
C) 500 K 
D) 5,000 K 
E) 25,000 K

Question 10

Electrons moving in a strong magnetic field emit ____________________ radiation.

Accepted Answer

The answer of Electrons moving in a strong magnetic field...

Question 11

A type II supernova

Accepted Answer

A) occurs when a white dwarf's mass exceeds the Chandrasekhar limit. 
B) is the result of helium flash. 
C) is characterized by a spectrum that shows hydrogen lines. 
D) occurs when the iron core of a massive star collapses. 
E) is characterized by a spectrum that shows hydrogen lines and occurs when the iron core of a massive star collapses. 
A) occurs when a white dwarf's mass exceeds the Chandrasekhar limit. 
B) is the result of helium flash. 
C) is characterized by a spectrum that shows hydrogen lines. 
D) occurs when the iron core of a massive star collapses. 
E) is characterized by a spectrum that shows hydrogen lines and occurs when the iron core of a massive star collapses.

Question 12

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 13

A Sun-like star will experience a helium flash in the core if

Accepted Answer

A) it is less massive than about 3 solar masses. 
B) it has become a red giant star. 
C) it has formed a helium core. 
D) the material in the core has gradually become degenerate. 
E) All of the other choices are correct. 
A) it is less massive than about 3 solar masses. 
B) it has become a red giant star. 
C) it has formed a helium core. 
D) the material in the core has gradually become degenerate. 
E) All of the other choices are correct.

Question 14

Giant and supergiant stars are rare because that stage of stellar evolution is short.

Accepted Answer

A) True 
 B)False

Question 15

A main-sequence star of 8.5 solar masses can become a white dwarf by

Accepted Answer

A) exceeding the Chandrasekhar limit. 
B) losing mass in a close binary. 
C) gaining mass. 
D) remaining at 8.5 solar masses. 
A) exceeding the Chandrasekhar limit. 
B) losing mass in a close binary. 
C) gaining mass. 
D) remaining at 8.5 solar masses.

Question 16

Even in degenerate matter, pressure depends on temperature.

Accepted Answer

A) True 
 B)False

Question 17

After what evolutionary stage does a star become a white dwarf

Accepted Answer

A) protostar 
B) pre-main sequence 
C) main sequence 
D) giant 
A) protostar 
B) pre-main sequence 
C) main sequence 
D) giant

Question 18

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

Accepted Answer

A planetary nebula is the result of an a

Question 19

Helium flash occurs

Accepted Answer

A) because helium is very explosive and cannot be controlled when the nuclear reactions occur. 
B) because degenerate gas does not allow the core to expand as it heats up. 
C) in Cepheid variables. 
D) in stars with masses less than 0.4 M. 
E) None of the other choices are correct. 
A) because helium is very explosive and cannot be controlled when the nuclear reactions occur. 
B) because degenerate gas does not allow the core to expand as it heats up. 
C) in Cepheid variables. 
D) in stars with masses less than 0.4 M. 
E) None of the other choices are correct.

Question 20

___________ particles were observed coming from supernova 1987A, confirming models and theories of core collapse formation of neutron stars.

Accepted Answer

The answer of ___________ particles were observed coming from supernova...

Why do higher-mass stars live shorter lives on the main sequence than lower-mass stars

About how long will a 0.5- star spend on the main sequence

Star clusters are important to our study of stars because

In the visual wavelength image, a/an ______________ cluster is shown.

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

Because more massive stars have more gravitational energy, they can fuse heavier nuclear fuels.

Stars in a star cluster

What is the difference between a supernova and a nova

We know that the central object in a planetary nebula has a surface temperature of at least ____ because the nebula contains large amounts of ionized hydrogen.

Electrons moving in a strong magnetic field emit ____________________ radiation.

A type II supernova

A Type Ia supernova is believed to occur when

A Sun-like star will experience a helium flash in the core if

Giant and supergiant stars are rare because that stage of stellar evolution is short.

A main-sequence star of 8.5 solar masses can become a white dwarf by

Even in degenerate matter, pressure depends on temperature.

After what evolutionary stage does a star become a white dwarf

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

Helium flash occurs

___________ particles were observed coming from supernova 1987A, confirming models and theories of core collapse formation of neutron stars.

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

The Origin of the Solar System

Earth and Moon: Bases for Comparative Planetology

Mercury, Venus, and Mars

The Outer Solar System

Meteorites, Asteroids, and Comets

Astrobiology: Life on Other Worlds

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Exam 10: The Deaths of Stars

Why do higher-mass stars live shorter lives on the main sequence than lower-mass stars

About how long will a 0.5- star spend on the main sequence

Star clusters are important to our study of stars because

In the visual wavelength image, a/an ______________ cluster is shown.

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

Because more massive stars have more gravitational energy, they can fuse heavier nuclear fuels.

Stars in a star cluster

What is the difference between a supernova and a nova

We know that the central object in a planetary nebula has a surface temperature of at least ____ because the nebula contains large amounts of ionized hydrogen.

Electrons moving in a strong magnetic field emit ____________________ radiation.

A type II supernova

A Type Ia supernova is believed to occur when

A Sun-like star will experience a helium flash in the core if

Giant and supergiant stars are rare because that stage of stellar evolution is short.

A main-sequence star of 8.5 solar masses can become a white dwarf by

Even in degenerate matter, pressure depends on temperature.

After what evolutionary stage does a star become a white dwarf

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

Helium flash occurs

___________ particles were observed coming from supernova 1987A, confirming models and theories of core collapse formation of neutron stars.

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

The Origin of the Solar System

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