Question 1

If the Sun and stars are supported by gas pressure, what supports a white dwarf?

Accepted Answer

A normal star is supported by energy flo

Question 2

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 3

Mass can flow from one star in a binary system to its companion through the first ____________________ point.

Accepted Answer

The answer of Mass can flow from one star in...

Question 4

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 5

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 6

A(n) ____________________ supernova is caused by the collapse of a massive star that has lost its outer envelope of hydrogen.

Accepted Answer

The answer of A(n) ____________________ supernova is caused by the...

Question 7

Type Ia and Type Ib supernovae both involve binary star systems.

Accepted Answer

A) True 
 B)False

Question 8

For a star of Sun-like mass, what is the last stage of the nuclear fusion?

Accepted Answer

A)  Hydrogen to helium 
B)  Helium to carbon and oxygen 
C)  Carbon to magnesium 
D)  Fusion goes all the way up to iron. 
A)  Hydrogen to helium 
B)  Helium to carbon and oxygen 
C)  Carbon to magnesium 
D)  Fusion goes all the way up to iron.

Question 9

Giant and supergiant stars are rare because

Accepted Answer

A)  they do not form as often as main-sequence stars. 
B)  the star blows up before the giant or supergiant stage is reached 
C)  the giant or supergiant stage is very short. 
D)  the giant or supergiant stage is very long 
A)  they do not form as often as main-sequence stars. 
B)  the star blows up before the giant or supergiant stage is reached 
C)  the giant or supergiant stage is very short. 
D)  the giant or supergiant stage is very long

Question 10

In degenerate matter

Accepted Answer

A)  pressure depends only on the temperature. 
B)  temperature depends only on density. 
C)  pressure does not depend on temperature. 
D)  pressure does not depend on density. 
E)  temperature depends only on density and does not depend on temperature. 
A)  pressure depends only on the temperature. 
B)  temperature depends only on density. 
C)  pressure does not depend on temperature. 
D)  pressure does not depend on density. 
E)  temperature depends only on density and does not depend on temperature.

Question 11

The spectra of Type II supernova contain no hydrogen lines.

Accepted Answer

A) True 
 B)False

Question 12

What is the difference between a supernova and a nova?

Accepted Answer

A nova is an eruption on the s

Question 13

A white dwarf cools slowly into a _________________ dwarf.

Accepted Answer

The answer of A white dwarf cools slowly into a...

Question 14

What is the approximate age of the star cluster in the H-R diagram below? ( Hint: Main-sequence stars of spectral types between A and B have core supplies of hydrogen sufficient to last about 250 million years, between A and F about 2 billion years, type G about 10 billion years, and between K and M about 30 billion years.)

Accepted Answer

A)  200 million years 
B)  2 billion years 
C)  10 billion years 
D)  30 billion years 
E)  The age of the cluster cannot be estimated from an H-R diagram of the cluster. 
A)  200 million years 
B)  2 billion years 
C)  10 billion years 
D)  30 billion years 
E)  The age of the cluster cannot be estimated from an H-R diagram of the cluster.

Question 15

If the stars at the turnoff point of a cluster have a mass of 3 M , what is the age of the cluster?

Accepted Answer

A)  3.0 × 1010 years 
B)  3.3 × 109 years 
C)  6.4 × 108 years 
D)  1.6 × 1011 years 
E)  The age of a star cluster cannot be determined from the mass of stars at the turnoff point. 
A)  3.0 × 1010 years 
B)  3.3 × 109 years 
C)  6.4 × 108 years 
D)  1.6 × 1011 years 
E)  The age of a star cluster cannot be determined from the mass of stars at the turnoff point.

Question 16

The maximum mass of a white dwarf is ____________________ solar masses.

Accepted Answer

The answer of The maximum mass of a white dwarf...

Question 17

When an aging massive star generates an iron core, the iron cannot fuse and thus the star cannot support its weight outside the core. The star is no longer in hydrostatic equilibrium and collapses, forming a supernova.

Accepted Answer

A) True 
 B)False

Question 18

What will eventually happen to a star after its formation is most affected by its initial

Accepted Answer

A)  speed through space. 
B)  oxygen content. 
C)  uranium content. 
D)  anti-matter content. 
E)  mass. 
A)  speed through space. 
B)  oxygen content. 
C)  uranium content. 
D)  anti-matter content. 
E)  mass.

Question 19

Which of the following nuclear fuels does a one-solar-mass star fuse over the course of its entire evolution?

Accepted Answer

A)  hydrogen 
B)  hydrogen and helium 
C)  hydrogen, helium and carbon 
D)  hydrogen, helium, carbon, and neon 
E)  hydrogen, helium, carbon, neon, and oxygen 
A)  hydrogen 
B)  hydrogen and helium 
C)  hydrogen, helium and carbon 
D)  hydrogen, helium, carbon, and neon 
E)  hydrogen, helium, carbon, neon, and oxygen

Question 20

The energy a white dwarf emits into space is

Accepted Answer

A)  replaced by fusion of hydrogen atoms into helium. 
B)  replaced by fusion of helium atoms into carbon. 
C)  not replaced. 
A)  replaced by fusion of hydrogen atoms into helium. 
B)  replaced by fusion of helium atoms into carbon. 
C)  not replaced.

If the Sun and stars are supported by gas pressure, what supports a white dwarf?

Stars in a star cluster

Mass can flow from one star in a binary system to its companion through the first ____________________ point.

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.

After what evolutionary stage does a star become a white dwarf?

A(n) ____________________ supernova is caused by the collapse of a massive star that has lost its outer envelope of hydrogen.

Type Ia and Type Ib supernovae both involve binary star systems.

For a star of Sun-like mass, what is the last stage of the nuclear fusion?

Giant and supergiant stars are rare because

In degenerate matter

The spectra of Type II supernova contain no hydrogen lines.

What is the difference between a supernova and a nova?

A white dwarf cools slowly into a _________________ dwarf.

If the stars at the turnoff point of a cluster have a mass of 3 M , what is the age of the cluster?

The maximum mass of a white dwarf is ____________________ solar masses.

When an aging massive star generates an iron core, the iron cannot fuse and thus the star cannot support its weight outside the core. The star is no longer in hydrostatic equilibrium and collapses, forming a supernova.

What will eventually happen to a star after its formation is most affected by its initial

Which of the following nuclear fuels does a one-solar-mass star fuse over the course of its entire evolution?

The energy a white dwarf emits into space is

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

If the Sun and stars are supported by gas pressure, what supports a white dwarf?

Stars in a star cluster

Mass can flow from one star in a binary system to its companion through the first ____________________ point.

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.

After what evolutionary stage does a star become a white dwarf?

A(n) ____________________ supernova is caused by the collapse of a massive star that has lost its outer envelope of hydrogen.

Type Ia and Type Ib supernovae both involve binary star systems.

For a star of Sun-like mass, what is the last stage of the nuclear fusion?

Giant and supergiant stars are rare because

In degenerate matter

The spectra of Type II supernova contain no hydrogen lines.

What is the difference between a supernova and a nova?

A white dwarf cools slowly into a _________________ dwarf.

If the stars at the turnoff point of a cluster have a mass of 3 M , what is the age of the cluster?

The maximum mass of a white dwarf is ____________________ solar masses.

When an aging massive star generates an iron core, the iron cannot fuse and thus the star cannot support its weight outside the core. The star is no longer in hydrostatic equilibrium and collapses, forming a supernova.

What will eventually happen to a star after its formation is most affected by its initial

Which of the following nuclear fuels does a one-solar-mass star fuse over the course of its entire evolution?

The energy a white dwarf emits into space is

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