Question 1

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 2

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 3

The theory that the collapse of a massive star's iron core produces neutrinos was supported by

Accepted Answer

A) the size and structure of the Crab nebula. 
B) laboratory measurements of the mass of the neutrino. 
C) the brightening of supernovae a few days after they are first visible. 
D) underground counts from solar neutrinos. 
E) the detection of neutrinos from the supernova of 1987. 
A) the size and structure of the Crab nebula. 
B) laboratory measurements of the mass of the neutrino. 
C) the brightening of supernovae a few days after they are first visible. 
D) underground counts from solar neutrinos. 
E) the detection of neutrinos from the supernova of 1987.

Question 4

Stars within a cluster that are at the turnoff point

Accepted Answer

A) have life expectancies that are equal to the age of the cluster. 
B) are stars that are just becoming white dwarfs. 
C) are stars that are just entering the main sequence portion of their evolution. 
D) are stars that are about to supernova. 
E) are stars that are generally spectral type G stars. 
A) have life expectancies that are equal to the age of the cluster. 
B) are stars that are just becoming white dwarfs. 
C) are stars that are just entering the main sequence portion of their evolution. 
D) are stars that are about to supernova. 
E) are stars that are generally spectral type G stars.

Question 5

A(n) _________ is a collection of $10^5$ to $10^6$ stars in a region 10 to 30 pc in diameter. The stars in the collection tend to be more than $10^9$ 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 6

When mass is transferred from one star to another in a close binary system, __________ momentum is conserved.

Accepted Answer

The answer of When mass is transferred from one star...

Question 7

The helium core flash is a very short time event.

Accepted Answer

A) True 
 B)False

Question 8

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 9

Red dwarfs (have/have not) yet died or evolved off the main sequence.

Accepted Answer

The answer of Red dwarfs (have/have not) yet died or evolved...

Question 10

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 11

A white dwarf is not necessarily the color white.

Accepted Answer

A) True 
 B)False

Question 12

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 13

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

Accepted Answer

When a star collapses into a w

Question 14

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 15

Stars less massive than 0.4 solar mass never become giant stars.

Accepted Answer

A) True 
 B)False

Question 16

The helium core flash occurs in very high mass stars.

Accepted Answer

A) True 
 B)False

Question 17

In the orbital plane of a binary star system matter can be transferred from one star to the other through the ___________, located directly between the two stars is the point where the Roche lobes meet.

Accepted Answer

A) turnoff points 
B) horizontal branch 
C) Lagrangian points 
D) synchrotron points 
E) radiation belts 
A) turnoff points 
B) horizontal branch 
C) Lagrangian points 
D) synchrotron points 
E) radiation belts

Question 18

Why do supernova remnants have limited lifetimes

Accepted Answer

They gradually mix w

Question 19

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 20

Helium fusion does not begin until the star has entered the giant region of the H-R diagram.

Accepted Answer

A) True 
 B)False

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

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

The theory that the collapse of a massive star's iron core produces neutrinos was supported by

Stars within a cluster that are at the turnoff point

A(n) _________ is a collection of $10^5$ to $10^6$ stars in a region 10 to 30 pc in diameter. The stars in the collection tend to be more than $10^9$ years old and mostly yellow and red stars.

When mass is transferred from one star to another in a close binary system, __________ momentum is conserved.

The helium core flash is a very short time event.

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

Red dwarfs (have/have not) yet died or evolved off the main sequence.

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

A white dwarf is not necessarily the color white.

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

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

Stars less massive than 0.4 solar mass never become giant stars.

The helium core flash occurs in very high mass stars.

In the orbital plane of a binary star system matter can be transferred from one star to the other through the ___________, located directly between the two stars is the point where the Roche lobes meet.

Why do supernova remnants have limited lifetimes

The image shows the Crab Nebula. The Crab Nebula is

Helium fusion does not begin until the star has entered the giant region of the H-R diagram.

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

Exam 10: The Deaths of Stars

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

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

The theory that the collapse of a massive star's iron core produces neutrinos was supported by

Stars within a cluster that are at the turnoff point

A(n) _________ is a collection of 10510^5105 to 10610^6106 stars in a region 10 to 30 pc in diameter. The stars in the collection tend to be more than 10910^9109 years old and mostly yellow and red stars.

When mass is transferred from one star to another in a close binary system, __________ momentum is conserved.

The helium core flash is a very short time event.

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

Red dwarfs (have/have not) yet died or evolved off the main sequence.

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

A white dwarf is not necessarily the color white.

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

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

Stars less massive than 0.4 solar mass never become giant stars.

The helium core flash occurs in very high mass stars.

In the orbital plane of a binary star system matter can be transferred from one star to the other through the ___________, located directly between the two stars is the point where the Roche lobes meet.

Why do supernova remnants have limited lifetimes

The image shows the Crab Nebula. The Crab Nebula is

Helium fusion does not begin until the star has entered the giant region of the H-R diagram.

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

A(n) _________ is a collection of $10^5$ to $10^6$ stars in a region 10 to 30 pc in diameter. The stars in the collection tend to be more than $10^9$ years old and mostly yellow and red stars.