Warm-Up 1.What is dark matter? 2.What is dark energy? Times
Up!
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Fate of the Universe
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Age of the Universe Rocks on Earth 4.2 billion years Oldest
stars 10-12 billion years Universe must be older Estimate backwards
13.8 billion years
http://www.universeadventure.org/big_bang/conseq-ageofuniv.htm
http://scienceblogs.com/startswithabang/2009/07/31/the-size-of-the-universe-a-har/
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1.When youre on a fast-spinning merry-go-round (like on a
playground), why do you feel like youre going to fly off? 2.What is
the evidence for dark matter? 3.How do scientists know dark matter
cant be made of ordinary matter particles such as protons and
neutrons? 4.Prior to the late 1990s, how did most cosmologists
think the universe would end? Why did they think that? 5.What is
the evidence for dark energy? 6.How much of the universe does dark
energy make up? How much does dark matter make up?
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The Theories There are 3 major theories for how the universe
will end. The Big Crunch The Big Chill The Big Rip
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The Big Crunch (closed universe) There is enough matter in the
universe to slow its expansion gravity takes over. Gravity will
then pull everything back together into one single point again.
Without dark matter, this theory is not possible. Dark matter
http://sandeepdmisra.wordpress.com/2011/04/
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Dark Energy In the 1990s scientists discovered a new force in
the universe: Dark Energy. Dark energy is the opposite of gravity.
Gravity pulls things together and dark energy pulls things apart.
If the Big Crunch or Big Chill are correct we should see the
expansion of the universe slowing but it appears to be speeding
up
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The Big Rip (open universe) As the universe becomes more spread
out dark energy has more power. This theory states that the
universe will expand at a faster and faster rate dark energy will
overpower gravity universe will be pulled apart (even atoms will be
pulled to pieces) Runaway Universe (Start at 3:30ish) Runaway
Universe
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http://sandeepdmisra.wordpress.com/2011/04/
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The Big Chill (flat universe) Assumes that there is not enough
matter to stop the universes expansion (gravity isnt strong enough)
The galaxies will continue to drift apart (moving more and more
slowly) the stars will use up all of the universes hydrogen (cant
form new stars) Universe will become cold and dark.
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Fate of the Universe Paragraph In a well constructed paragraph
explain what you think will be the ultimate fate of the universe.
Be sure to support your claim with evidence from notes and
reading.
