Question 1

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 2

As a Sun-like main-sequence star exhausts hydrogen in its core, it next becomes

Accepted Answer

A)  a protostar. 
B)  a red giant star. 
C)  a white dwarf star. 
A)  a protostar. 
B)  a red giant star. 
C)  a white dwarf star.

Question 3

The helium flash is the cause of some supernovae.

Accepted Answer

A) True 
 B)False

Question 4

The person in the drawing ____________________ in the right panel when compared to the left panel because of conservation of angular momentum.

Accepted Answer

A)  spins faster 
B)  spins slower 
C)  spins at the same rate 
D)  None of the other choices are correct. 
A)  spins faster 
B)  spins slower 
C)  spins at the same rate 
D)  None of the other choices are correct.

Question 5

The Crab nebula is

Accepted Answer

A)  a planetary nebula. 
B)  a Bok globule. 
C)  an open cluster. 
D)  an absorption nebula. 
E)  a supernova remnant. 
A)  a planetary nebula. 
B)  a Bok globule. 
C)  an open cluster. 
D)  an absorption nebula. 
E)  a supernova remnant.

Question 6

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 7

The Sun will eventually become a supernova.

Accepted Answer

A) True 
 B)False

Question 8

Very massive stars lose their outer layers in a planetary nebula.

Accepted Answer

A) True 
 B)False

Question 9

If white dwarfs have exhausted their fuel, why are they hot?

Accepted Answer

When a star collapses into a w

Question 10

Explain the major differences between type II supernova and a type I supernova.

Accepted Answer

​ Supernovae that do not have

Question 11

The image shows the Crab Nebula. The Crab Nebula is

Accepted Answer

A)  a planetary nebula. 
B)  a name for the cloud of gas and dust which later became our solar system. 
C)  an ejected cloud of gas from a supernova. 
D)  in the constellation Orion, containing many bright young blue stars. 
A)  a planetary nebula. 
B)  a name for the cloud of gas and dust which later became our solar system. 
C)  an ejected cloud of gas from a supernova. 
D)  in the constellation Orion, containing many bright young blue stars.

Question 12

A planetary nebula is

Accepted Answer

A)  the expelled outer atmosphere of a medium-mass star. 
B)  produced by a supernova explosion. 
C)  produced by a nova explosion. 
D)  a nebula within which planets are forming. 
E)  a cloud of hot gas surrounding a planet. 
A)  the expelled outer atmosphere of a medium-mass star. 
B)  produced by a supernova explosion. 
C)  produced by a nova explosion. 
D)  a nebula within which planets are forming. 
E)  a cloud of hot gas surrounding a planet.

Question 13

As material leaves an expanding star and begins to fall into a white dwarf close companion

Accepted Answer

A)  an accretion disk will form around the white dwarf. 
B)  the material will cool off because it begins to move at high velocities. 
C)  the material will fall directly straight onto the surface of the white dwarf. 
D)  the white dwarf will produce a protostar. 
E)  the white dwarf's iron core will collapse. 
A)  an accretion disk will form around the white dwarf. 
B)  the material will cool off because it begins to move at high velocities. 
C)  the material will fall directly straight onto the surface of the white dwarf. 
D)  the white dwarf will produce a protostar. 
E)  the white dwarf's iron core will collapse.

Question 14

A white dwarf star is prevented from collapsing by

Accepted Answer

A)  nuclear energy it is generating. 
B)  its gravitational force. 
C)  Hubble's law of extragalactic redshifts. 
D)  degenerate electron gas pressure. 
E)  degenerate astronomers observing the star. 
A)  nuclear energy it is generating. 
B)  its gravitational force. 
C)  Hubble's law of extragalactic redshifts. 
D)  degenerate electron gas pressure. 
E)  degenerate astronomers observing the star.

Question 15

A planetary nebula is an example of a star no longer in hydrostatic equilibrium.

Accepted Answer

A) True 
 B)False

Question 16

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 17

Why do supernova remnants have limited lifetimes?

Accepted Answer

They gradually mix w

Question 18

___________ 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...

Question 19

The Helix and Egg nebulae which originated from (what are today) white dwarf stars are

Accepted Answer

A)  supernova remnants. 
B)  planetary nebulae. 
C)  the result of uranium detonation. 
D)  the result of the collapse of the iron core of each star. 
E)  nebulae associated with protostars. 
A)  supernova remnants. 
B)  planetary nebulae. 
C)  the result of uranium detonation. 
D)  the result of the collapse of the iron core of each star. 
E)  nebulae associated with protostars.

Question 20

The Algol paradox is explained by considering

Accepted Answer

A)  the degenerate nature of the hydrogen on the surface of the white dwarf. 
B)  synchrotron radiation. 
C)  the rate of expansion of the shock wave inside the supernova. 
D)  the rotation rate of a neutron star. 
E)  mass transfer between the two stars in a binary system. 
A)  the degenerate nature of the hydrogen on the surface of the white dwarf. 
B)  synchrotron radiation. 
C)  the rate of expansion of the shock wave inside the supernova. 
D)  the rotation rate of a neutron star. 
E)  mass transfer between the two stars in a binary system.

Helium flash occurs

As a Sun-like main-sequence star exhausts hydrogen in its core, it next becomes

The helium flash is the cause of some supernovae.

The person in the drawing ____________________ in the right panel when compared to the left panel because of conservation of angular momentum.

The Crab nebula is

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

The Sun will eventually become a supernova.

Very massive stars lose their outer layers in a planetary nebula.

If white dwarfs have exhausted their fuel, why are they hot?

Explain the major differences between type II supernova and a type I supernova.

The image shows the Crab Nebula. The Crab Nebula is

A planetary nebula is

As material leaves an expanding star and begins to fall into a white dwarf close companion

A white dwarf star is prevented from collapsing by

A planetary nebula is an example of a star no longer in hydrostatic equilibrium.

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

Why do supernova remnants have limited lifetimes?

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

The Helix and Egg nebulae which originated from (what are today) white dwarf stars are

The Algol paradox is explained by considering

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

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Exam 10: The Deaths of Stars

Helium flash occurs

As a Sun-like main-sequence star exhausts hydrogen in its core, it next becomes

The helium flash is the cause of some supernovae.

The person in the drawing ____________________ in the right panel when compared to the left panel because of conservation of angular momentum.

The Crab nebula is

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

The Sun will eventually become a supernova.

Very massive stars lose their outer layers in a planetary nebula.

If white dwarfs have exhausted their fuel, why are they hot?

Explain the major differences between type II supernova and a type I supernova.

The image shows the Crab Nebula. The Crab Nebula is

A planetary nebula is

As material leaves an expanding star and begins to fall into a white dwarf close companion

A white dwarf star is prevented from collapsing by

A planetary nebula is an example of a star no longer in hydrostatic equilibrium.

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

Why do supernova remnants have limited lifetimes?

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

The Helix and Egg nebulae which originated from (what are today) white dwarf stars are

The Algol paradox is explained by considering

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