Download Life_Cycle_of_a_Star_Powerpoint

Booklet directions
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Slides 2-8 of this powerpoint are not included in the booklet, they are only for class discussion
(which we completed on Thursday 12/5/13)
Cover of booklet – slide 9
Page 1 of booklet – slide 10
Page 2 of booklet – slide 11
Page 3 of booklet (divide in half) – slides 12 and 13.
Page 4 of booklet (divide in three) – title is “Main Sequence Period”, slide 15 goes in the first
section, slide 16 goes in the second section, slide 17 goes in the third section
Page 5 of booklet - slide 18
Page 6 of booklet – slide 19
Page 7 of booklet – slide 20
Page 8 of booklet – slide 21
Page 9 of booklet – slide 22
Page 10 of booklet (divide in half) – slides 23 and 24
**Everything on these slides (text) should be in your booklet, if you want to go above and beyond
you could print out pictures from the Hubble Telescope Gallery website and add a picture of each
stage of the stars’ lifecycle (hint, hint, hint). Have a great snow day!!
Beyond Earth
Use this powerpoint to make your
foldable/booklet
Solar System
• A star and a group of planets that
revolve around the star.
• Our solar system contains a star (the
sun), nine planets, and
thousands of asteroids.
• Our sun is located
on the edge of the
Milky Way galaxy.
Galaxy
• A System of stars, dust, and gases all
heald together as a group by gravity.
– Our solar system is part of the Milky Way
galaxy.
– There are more than a billion galaxies in
the universe.
**3 types of galaxies
Types of Galaxies
• Spiral Galaxies – shaped like discs with
a bulge in the middle. Spiral arms seem
to wind outward
Types of Galaxies Cont.
• Elliptical Galaxies – look like spheres or
flattened spheres that are bright in the
middle.
Types of Galaxies – Cont.
• Irregular Galaxies
– No specific shape or pattern.
Other Important Vocabulary
• Clusters – a group of galaxies make up a
cluster.
– The milky way belongs to a cluster of 32
galaxies called the Local Group.
Superclusters – a group of clusters
Universe – all the superclusters form the
universe. The universe consists of
everything that exists in space.
Life Cycle of a Star
(Cover of booklet)
Mass of star
How long a star lives depends on how
much mass it has
A small mass star uses less fuel so it lasts
longer so . . .
The smaller the mass the longer it lasts
Life Cycle of a Star
The smaller the
stars, the longer
the life because
they use up
their fuel more
slowly
Red Dwarf
Red Giant
White Dwarf
Black Dwarf
Nebula
How long a
star lives
depends on
the mass
Protostar
Yellow Star
Blue Giant
Red Super Giant
Supernova
Black Hole
Neutron Star
Nebula
• All stars begin as parts of nebulas
• A large cloud of gas and dust
• large amount of gas in a small volume,
very dense
Protostar
• The 1st stage of a star’s life
• A contracting cloud of gas and dust
• Pressure and heat start nuclear fusion
Different Masses mean different types of stars
Main Sequence Period
• The main life period of a star
– Can be classified as:
• Red dwarf – small mass star
• Yellow star – medium mass star (our sun)
• Blue Giant – large mass star
Red Dwarf
• A small mass star
• Can last up to 200 billion years
Yellow Star
• A medium mass star (Average size,
average temperature)
• Our sun is a yellow star
• Lives for 10 billion years
Blue Giant
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A large mass star
10-15 times larger than the sun
VERY hot
Short lives because they have used up a
lot of fuel
Red Giant
• The star runs out of fuel
• outer parts expand, then the core
shrinks
• It turns red as it is cooling
• This phase will last until the star
exhausts its remaining fuel.
• The pressure of the nuclear reaction is
not strong enough to equalize the force
of gravity so the star will collapse.
Red Super Giant
• The star runs out of fuel
• The core shrinks and the outer parts
expand
• It turns red as it is cooling
• This phase will last until the star
exhausts its remaining fuel.
• The pressure of the nuclear reaction is
not strong enough to equalize the force
of gravity so the star will collapse.
White Dwarf
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No more fuel left
Faint glow from left over energy
Outer parts drift out into space
Small blue white hot core is left
About the size of Earth
Supernova
• As the core shrinks, pressure increases
• Results in an explosion
Black Dwarf
• When the white dwarf stops glowing it
is dead\very dense
Black Hole
• Remains of explosion collapse into a
black hole
• Most large mass stars turn into black
holes
Neutron Star
• After explosion some material left
behind
• Forms a neutron star
• Dense and small