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Page 6 Astronomy
Workbook
Explain that the heavy elements
found on Earth formed in stars
1st thing on page 6
(from #8 yellow handout)
What do the colors and lines in the
spectrum of a star indicate?
The elements that make up the star.
Life Cycle of Stars by MASS
Nebula-gas
and dust
Protostars
Star like our
sun
Massive
star
Red
giant
Red
supergiant
Planetary
nebula
White
dwarf then
black
dwarf?
supernova Neutron
star and/or
black hole
2nd thing on page 6 (from #10 on green handout)
How long does a main sequence star
maintain a stable size?
As long as it has an ample supply of hydrogen
to fuse into helium.
Main sequence stars fuse hydrogen into
helium.
Life Cycle of Stars by MASS
Nebula-gas
and dust
Protostars
Star like our
sun
Massive
star
Red
giant
Red
supergiant
Planetary
nebula
White
dwarf then
black
dwarf?
supernova Neutron
star and/or
black hole
Nucleosynthesis and Fusion
Reactions
The main process responsible for the energy produced in most
main sequence stars is the proton-proton (pp) chain.
Red Giant Stars
3rd thing
Astronomy
Workbook pg.
6
The final
stages of a
sun like star,
helium atoms
fuse into
carbon and
oxygen.
Life Cycle of Stars by MASS
Nebula-gas
and dust
Protostars
Star like our
sun
Massive
star
Red
giant
Red
supergiant
Planetary
nebula
White
dwarf then
black
dwarf?
supernova Neutron
star and/or
black hole
4th thing on page 6 (from # 21 on green handout)
What happens to the carbon atoms in a
collapsing Massive Star as temperatures
rise and fusion begins again?
The carbon atoms in the core of the massive
star fuse into heavier elements such as oxygen,
magnesium, silicon, or Iron.
Life Cycle of Stars by MASS
Nebula-gas
and dust
Protostars
Star like our
sun
Massive
star
Red
giant
Red
supergiant
Planetary
nebula
White
dwarf then
black
dwarf?
supernova Neutron
star and/or
black hole
The End?