Download PDF format

Chapter 17 Reading Quiz Clickers
The Cosmic Perspective
Seventh Edition
Star Stuff
© 2014 Pearson Education, Inc.
Chapter 17
17.1 Lives in the Balance
• 
How does a star's mass affect nuclear fusion?
© 2014 Pearson Education, Inc.
Chapter 17
High-mass stars are those stars born with
masses greater than about
a) 
b) 
c) 
d) 
3 solar masses.
8 solar masses.
16 solar masses.
35 solar masses.
© 2014 Pearson Education, Inc.
Chapter 17
High-mass stars are those stars born with
masses greater than about
a) 
b) 
c) 
d) 
3 solar masses.
8 solar masses.
16 solar masses.
35 solar masses.
© 2014 Pearson Education, Inc.
Chapter 17
17.2 Life as a Low-Mass Star
• 
• 
What are the life stages of a low-mass star?
How does a low-mass star die?
© 2014 Pearson Education, Inc.
Chapter 17
How does a main-sequence star's convection
zone depend on its mass?
a) 
b) 
c) 
d) 
e) 
More massive stars have larger convection zones.
Less massive stars have larger convection zones.
High mass stars have convective cores.
Low mass stars have no convection.
B and C
© 2014 Pearson Education, Inc.
Chapter 17
How does a main-sequence star's convection
zone depend on its mass?
a) 
b) 
c) 
d) 
e) 
More massive stars have larger convection zones.
Less massive stars have larger convection zones.
High mass stars have convective cores.
Low mass stars have no convection.
B and C
© 2014 Pearson Education, Inc.
Chapter 17
What spectral type are flare stars?
a) 
b) 
c) 
d) 
e) 
O
A
K
M
L
© 2014 Pearson Education, Inc.
Chapter 17
What spectral type are flare stars?
a) 
b) 
c) 
d) 
e) 
O
A
K
M
L
© 2014 Pearson Education, Inc.
Chapter 17
When a low-mass star can no longer fuse
hydrogen into helium in its core,
a)  hydrogen fusion will begin in a shell around the
core.
b)  helium will begin to fuse into carbon in the core.
c)  all fusion reactions stop and the star becomes a
white dwarf.
d)  the outer layers of the star blow off in a slow but
massive stellar wind.
© 2014 Pearson Education, Inc.
Chapter 17
When a low-mass star can no longer fuse
hydrogen into helium in its core,
a)  hydrogen fusion will begin in a shell around the
core.
b)  helium will begin to fuse into carbon in the core.
c)  all fusion reactions stop and the star becomes a
white dwarf.
d)  the outer layers of the star blow off in a slow but
massive stellar wind.
© 2014 Pearson Education, Inc.
Chapter 17
When does the expansion of a red giant stop?
a)  when it reaches a size of about 200 times the size
of the Sun
b)  when hydrogen shell burning begins
c)  when hydrogen shell burning stops
d)  when helium fusion begins in the core
© 2014 Pearson Education, Inc.
Chapter 17
When does the expansion of a red giant stop?
a)  when it reaches a size of about 200 times the size
of the Sun
b)  when hydrogen shell burning begins
c)  when hydrogen shell burning stops
d)  when helium fusion begins in the core
© 2014 Pearson Education, Inc.
Chapter 17
What powers stars on the horizontal branch of
the Hertzsprung-Russell diagram?
a)  helium fusion in the core and hydrogen shell
fusion
b)  hydrogen shell fusion
c)  hydrogen fusion in the core
d)  gravitational contraction
© 2014 Pearson Education, Inc.
Chapter 17
What powers stars on the horizontal branch of
the Hertzsprung-Russell diagram?
a)  helium fusion in the core and hydrogen shell
fusion
b)  hydrogen shell fusion
c)  hydrogen fusion in the core
d)  gravitational contraction
© 2014 Pearson Education, Inc.
Chapter 17
What nuclear reaction(s) takes place in a
carbon star?
a) 
b) 
c) 
d) 
e) 
helium fusion in the core
hydrogen shell fusion
helium shell fusion
all of the above
B and C
© 2014 Pearson Education, Inc.
Chapter 17
What nuclear reaction(s) takes place in a
carbon star?
a) 
b) 
c) 
d) 
e) 
helium fusion in the core
hydrogen shell fusion
helium shell fusion
all of the above
B and C
© 2014 Pearson Education, Inc.
Chapter 17
What is a planetary nebula?
a)  a red supergiant
b)  the remnants of a supernova
c)  gas ejected and ionized by a dying low-mass
star
d)  gas and dust forming planets around a protostar
© 2014 Pearson Education, Inc.
Chapter 17
What is a planetary nebula?
a)  a red supergiant
b)  the remnants of a supernova
c)  gas ejected and ionized by a dying low-mass
star
d)  gas and dust forming planets around a protostar
© 2014 Pearson Education, Inc.
Chapter 17
17.3 Life as a High-Mass Star
• 
• 
• 
What are the life stages of a high-mass star?
How do high-mass stars make the elements
necessary for life?
How does a high-mass star die?
© 2014 Pearson Education, Inc.
Chapter 17
What is the net product of the CNO cycle?
a) 
b) 
c) 
d) 
e) 
helium
carbon
nitrogen
oxygen
all of the above
© 2014 Pearson Education, Inc.
Chapter 17
What is the net product of the CNO cycle?
a) 
b) 
c) 
d) 
e) 
helium
carbon
nitrogen
oxygen
all of the above
© 2014 Pearson Education, Inc.
Chapter 17
What happens in a high-mass star after it stops
core hydrogen fusion?
a) 
b) 
c) 
d) 
e) 
Hydrogen shell fusion starts.
A helium flash occurs.
Helium core fusion starts gradually.
A and B
A and C
© 2014 Pearson Education, Inc.
Chapter 17
What happens in a high-mass star after it stops
core hydrogen fusion?
a) 
b) 
c) 
d) 
e) 
Hydrogen shell fusion starts.
A helium flash occurs.
Helium core fusion starts gradually.
A and B
A and C
© 2014 Pearson Education, Inc.
Chapter 17
What reaction produces oxygen from carbon in
high-mass stars?
a) 
b) 
c) 
d) 
e) 
helium capture
CNO cycle
proton-proton capture
proton-proton chain
proton-neutron capture
© 2014 Pearson Education, Inc.
Chapter 17
What reaction produces oxygen from carbon in
high-mass stars?
a) 
b) 
c) 
d) 
e) 
helium capture
CNO cycle
proton-proton capture
proton-proton chain
proton-neutron capture
© 2014 Pearson Education, Inc.
Chapter 17
What is the heaviest element produced in the
core of a high-mass star?
a) 
b) 
c) 
d) 
e) 
carbon
silicon
iron
lead
uranium
© 2014 Pearson Education, Inc.
Chapter 17
What is the heaviest element produced in the
core of a high-mass star?
a) 
b) 
c) 
d) 
e) 
carbon
silicon
iron
lead
uranium
© 2014 Pearson Education, Inc.
Chapter 17
What observations support our understanding
of the origin of elements?
a)  The spectra of older stars show less heavy elements
than the spectra of newer stars.
b)  Elements heavier than iron are very rare.
c)  Heavy elements with an even number of protons are
more common than those with an odd number of
protons.
d)  all of the above
e)  A and B
© 2014 Pearson Education, Inc.
Chapter 17
What observations support our understanding
of the origin of elements?
a)  The spectra of older stars show less heavy elements
than the spectra of newer stars.
b)  Elements heavier than iron are very rare.
c)  Heavy elements with an even number of protons are
more common than those with an odd number of
protons.
d)  all of the above
e)  A and B
© 2014 Pearson Education, Inc.
Chapter 17
What is the source of energy in a supernova?
a) 
b) 
c) 
d) 
nuclear fusion
nuclear fission
gravitational potential energy
chemical potential energy
© 2014 Pearson Education, Inc.
Chapter 17
What is the source of energy in a supernova?
a) 
b) 
c) 
d) 
nuclear fusion
nuclear fission
gravitational potential energy
chemical potential energy
© 2014 Pearson Education, Inc.
Chapter 17
What is produced in the core of a star that goes
supernova?
a) 
b) 
c) 
d) 
e) 
neutrons and positrons
neutrons and neutrinos
protons and neutrinos
electrons and positrons
protons and positrons
© 2014 Pearson Education, Inc.
Chapter 17
What is produced in the core of a star that goes
supernova?
a) 
b) 
c) 
d) 
e) 
neutrons and positrons
neutrons and neutrinos
protons and neutrinos
electrons and positrons
protons and positrons
© 2014 Pearson Education, Inc.
Chapter 17
In what stage does a high-mass star spend
most of its life?
a) 
b) 
c) 
d) 
e) 
protostar
main-sequence star
red supergiant
helium-burning supergiant
multiple shell-burning supergiant
© 2014 Pearson Education, Inc.
Chapter 17
In what stage does a high-mass star spend
most of its life?
a) 
b) 
c) 
d) 
e) 
protostar
main-sequence star
red supergiant
helium-burning supergiant
multiple shell-burning supergiant
© 2014 Pearson Education, Inc.
Chapter 17
17.4 The Roles of Mass and Mass Exchange
• 
How does a star's mass determine its life story?
© 2014 Pearson Education, Inc.
Chapter 17
How can a binary star have a red giant that is
less massive than its main-sequence
companion?
a)  The red giant lost mass to the main-sequence star.
b)  The main-sequence star formed later than the red giant.
c)  The red giant had accelerated evolution due to more
heavy elements.
d)  The main-sequence star had slower evolution due to
winds from the red giant.
e)  The red giant had faster evolution due to winds from the
main-sequence star.
© 2014 Pearson Education, Inc.
Chapter 17
How can a binary star have a red giant that is
less massive than its main-sequence
companion?
a)  The red giant lost mass to the main-sequence star.
b)  The main-sequence star formed later than the red giant.
c)  The red giant had accelerated evolution due to more
heavy elements.
d)  The main-sequence star had slower evolution due to
winds from the red giant.
e)  The red giant had faster evolution due to winds from the
main-sequence star.
© 2014 Pearson Education, Inc.