Question 1

As a star begins to evolve away from the main sequence,it gets larger.

Accepted Answer

A) True 
 B)False

Question 2

In a fairly young star cluster,if the most massive stars are swelling up into giants,the least massive stars are:

Accepted Answer

A)  also evolving off the main sequence as well. 
B)  continuing to shine as stable main sequence stars. 
C)  blowing off shells as planetary nebula instead. 
D)  collapsing directly to white dwarfs. 
E)  still evolving toward their ZAMS positions. 
A)  also evolving off the main sequence as well. 
B)  continuing to shine as stable main sequence stars. 
C)  blowing off shells as planetary nebula instead. 
D)  collapsing directly to white dwarfs. 
E)  still evolving toward their ZAMS positions.

Question 3

What is the unusual result of mass transfer in the Algol binary system?

Accepted Answer

A)  a helium white dwarf 
B)  a carbon white dwarf 
C)  a black dwarf 
D)  a red dwarf 
E)  a brown dwarf 
A)  a helium white dwarf 
B)  a carbon white dwarf 
C)  a black dwarf 
D)  a red dwarf 
E)  a brown dwarf

Question 4

The brightest stars in aging globular clusters will be:

Accepted Answer

A)  core stars of planetary nebulae. 
B)  massive blue main sequence stars like Spica. 
C)  blue stragglers. 
D)  red supergiants like Betelguese and Antares. 
E)  blue supergiants like Rigel and Deneb. 
A)  core stars of planetary nebulae. 
B)  massive blue main sequence stars like Spica. 
C)  blue stragglers. 
D)  red supergiants like Betelguese and Antares. 
E)  blue supergiants like Rigel and Deneb.

Question 5

What spectral type of star that is still around formed longest ago?

Accepted Answer

A)  O 
B)  A 
C)  F 
D)  K 
E)  M 
A)  O 
B)  A 
C)  F 
D)  K 
E)  M

Question 6

The order of evolutionary stages of a star like the Sun would be Main Sequence,giant,planetary nebula,and finally a(n)________.

Accepted Answer

The answer of The order of evolutionary stages of a...

Question 7

When a star becomes a red giant,its core expands to a roughly proportional larger size too.

Accepted Answer

A) True 
 B)False

Question 8

While more massive than most of its neighbors,the Sun is still technically a low mass star.

Accepted Answer

A) True 
 B)False

Question 9

Will the Sun ever turn into a brown dwarf? Why or why not?

Accepted Answer

No,it is massive enough to ign

Question 10

At which stage in a Sun-like star's life is its core the least dense?

Accepted Answer

A)  Main Sequence 
B)  Subgiant Branch 
C)  Helium Fusion 
D)  Planetary Nebula 
E)  White Dwarf 
A)  Main Sequence 
B)  Subgiant Branch 
C)  Helium Fusion 
D)  Planetary Nebula 
E)  White Dwarf

Question 11

When helium fusion begins in a one solar mass main star,it begins gradually,with this rate slowly increasing over time.

Accepted Answer

A) True 
 B)False

Question 12

In an H-R Diagram,the path showing changes in a star's luminosity and surface temperature as a function of time is called its ________.

Accepted Answer

The answer of In an H-R Diagram,the path showing changes...

Question 13

For binary star systems where the stars are separated by more than 1000 stellar radii,mass transfer is not an issue.

Accepted Answer

A) True 
 B)False

Question 14

Every red dwarf star that ever joined the main sequence is still there today.

Accepted Answer

A) True 
 B)False

Question 15

Mass transfer in binaries occurs when one giant swells to reach the:

Accepted Answer

A)  Chandrasekhar Limit. 
B)  Cassini Division. 
C)  Hayashi Track. 
D)  Roche Lobe. 
E)  Herbig-Haro Limit. 
A)  Chandrasekhar Limit. 
B)  Cassini Division. 
C)  Hayashi Track. 
D)  Roche Lobe. 
E)  Herbig-Haro Limit.

Question 16

What is the source of the large dust shells seen around some red giants and red supergiants?

Accepted Answer

A)  leftover material from their formation 
B)  debris left behind by a supernova 
C)  material from winds from these same stars 
D)  debris left behind by passing comets 
E)  star-forming molecular clouds 
A)  leftover material from their formation 
B)  debris left behind by a supernova 
C)  material from winds from these same stars 
D)  debris left behind by passing comets 
E)  star-forming molecular clouds

Question 17

-Refer to the figure above.At what numbered point on the graph above does the helium flash occur?

Accepted Answer

A)  7 
B)  8 
C)  9 
D)  10 
E)  11 
A)  7 
B)  8 
C)  9 
D)  10 
E)  11

Question 18

Discuss the source of energy for a star like the Sun when it is on the Main Sequence.Include the role of nuclear,electrical,and gravitational forces,temperature,and chemical composition.How long can this star burn its fuel and what marks the end of this stage of its life?

Accepted Answer

The Sun produces energy via the proton-p

Question 19

During a helium flash,what happens to the star? Does it get brighter? Why or why not?

Accepted Answer

The energy released in a helium flash ex

Question 20

Compared to a cluster containing type O and B stars,a cluster with only type F and cooler stars will be:

Accepted Answer

A)  younger. 
B)  older. 
C)  further away. 
D)  more obscured by dust. 
E)  less obscured by dust. 
A)  younger. 
B)  older. 
C)  further away. 
D)  more obscured by dust. 
E)  less obscured by dust.

Exam 20: Stellar Evolution: The Life and Death of a Star

As a star begins to evolve away from the main sequence,it gets larger.

In a fairly young star cluster,if the most massive stars are swelling up into giants,the least massive stars are:

What is the unusual result of mass transfer in the Algol binary system?

The brightest stars in aging globular clusters will be:

What spectral type of star that is still around formed longest ago?

The order of evolutionary stages of a star like the Sun would be Main Sequence,giant,planetary nebula,and finally a(n)________.

When a star becomes a red giant,its core expands to a roughly proportional larger size too.

While more massive than most of its neighbors,the Sun is still technically a low mass star.

Will the Sun ever turn into a brown dwarf? Why or why not?

At which stage in a Sun-like star's life is its core the least dense?

When helium fusion begins in a one solar mass main star,it begins gradually,with this rate slowly increasing over time.

In an H-R Diagram,the path showing changes in a star's luminosity and surface temperature as a function of time is called its ________.

For binary star systems where the stars are separated by more than 1000 stellar radii,mass transfer is not an issue.

Every red dwarf star that ever joined the main sequence is still there today.

Mass transfer in binaries occurs when one giant swells to reach the:

What is the source of the large dust shells seen around some red giants and red supergiants?

-Refer to the figure above.At what numbered point on the graph above does the helium flash occur?

Discuss the source of energy for a star like the Sun when it is on the Main Sequence.Include the role of nuclear,electrical,and gravitational forces,temperature,and chemical composition.How long can this star burn its fuel and what marks the end of this stage of its life?

During a helium flash,what happens to the star? Does it get brighter? Why or why not?

Compared to a cluster containing type O and B stars,a cluster with only type F and cooler stars will be:

Charting the Heavens: The Foundations of Astronomy

The Copernican Revolution: The Birth of Modern Science

Radiation: Information from the Cosmos

Spectroscopy: The Inner Workings of Atoms

Telescopes: The Tools of Astronomy

The Solar System: Comparative Planetology and Formation Models

Earth: Our Home in Space

The Moon and Mercury: Scorched and Battered Worlds

Venus: Earth's Sister Planet

Mars: A Near Miss for Life?

Jupiter: Giant of the Solar System

Saturn: Spectacular Rings and Mysterious Moons

Uranus and Neptune: The Outer Worlds of the Solar System

Solar System Debris: Keys to Our Origin

Exoplanets: Planetary Systems Beyond Our Own

The Sun: Our Parent Star

The Stars: Giants,Dwarfs,and the Main Sequence

The Interstellar Medium: Gas and Dust among the Stars

Star Formation: A Traumatic Birth

Stellar Explosions: Novae,Supernovae,and the Formation of the Elements

Neutron Stars and Black Holes: Strange States of Matter

The Milky Way Galaxy: A Spiral in Space

Galaxies: Building Blocks of the Universe

Galaxies and Dark Matter: The Large-Scale Structure of the Cosmos

Cosmology: The Big Bang and the Fate of the Universe

The Early Universe: Toward the Beginning of Time

Life in the Universe: Are We Alone?

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