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Aces Training• Keep your Aces Answer Sheet!• Worth a large Test. (100 pts)
1. Pick-up Aces “Warm-up” on back table.
2. Turn-in answer sheet before we go over it.
3. Turn-in questions.4. Pick-up both at beginning of
period on back table.
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Strategy Review.1. P.O.E.
2. Focus Words
3. 2-pass method
4. Know your enemy
1. Know your enemy
2. 2-pass method
3. Focus Words
4. P.O.E.
Which ORDER should you use them?
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#20
#21
#22
#23
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“The Solar System in a Nutshell”
Chapter 25
However did it get into
this nutshell?!
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Do Stars Move?
Does the Universe have an end? Will you eventually run into a wall?...
How many constellations there are?
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Properties of Stars
• Color:– b/c of Tempo
– Hot = B____
– Cooler = R___
– Yellow?
• Mass:– How much “stuff”
– “M_____R”ATTELUE
ED
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Binary Stars:
What are they?!• Stars that orbit each other• Gravity!• Helps find Mass!
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Artist Rendition of Binary System LH54-425, located in the Large Magellanic CloudNasa.gov
Really not that
cool.
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Distance to StarsParallax:
– Noticing shift in location throughout the year.
Light-years!
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Brightness.
1. Size
2. Tempo
3. Distance from Earth
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Hertzsprung-Russell Diagram
Variable Stars
– Some change brightness
Nova
– Gets Brighter!
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Gosh that sounds familiar…
A Cloud of Dust & Gas in Space is a ________!NEBULA
Assignment!
– GR. 25.1 For Stamp!
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Stellar Evolution
1. Birth (contraction)
2. Protostar (Tempo ↑)
3. Main-Sequence– (Hydrogen Fusion)– (90% lifetime)
4. Red-Giant (Grows, Tempo ↑↓)
5. Death. (Burn-out)– Runs out of gas.– Literally.
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Nucleosynthesis.
As stars die, they release ingredients for new elements.
Dying star
Uses Hydrogen
Releases Helium:
Smallest Element
Heliumsticks
together
Forms other
elements
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Eventually…
…All stars collapse!
1. White Dwarf
2. Neutron Star
3. Black Hole
All VeryDENSE!
most
least
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The Universe.
• Contains all galaxies.
• Everything.
Lawndale HS:Universe 600 building:
Milky WayGalaxy
Room 605:Solar System
Your Desk:Earth.
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• Spiral Galaxy
• Our Solar system = 2/3 way out!
Milky Way Galaxy.
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Expanding Universe.
• Getting B______.
• Hubble’s Law:– Galaxies that are farther away are moving
away faster!
IGGER