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27 Cards in this Set
- Front
- Back
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Sun and planets condensed out of a cloud of interplanetary gas and other mass
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Nebular Theory-
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which scientist Developed Nebular Theory
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descartes (des_cart-a)
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problems with nebular theory
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1)why is 99% of all mass is in the sun but 99% of all angular motion is in the planets.
2)how does cloud get rotation. |
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says that a giant comet visited the Sun, passed too near, sucked out mass from the Sun and deposited it out as it left making planets
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Catastrophism
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another name for catastrophism
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Collision
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which scientist Developed Catastrophism
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Georges Buffon
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what inspired George Buffons theory of catastrophism
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haleys comet
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Cold Accretion Theory is actually
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-Nebular theory revised and better
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To grow or increase gradually by combining gases, dust, rocks
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accretion
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temperature of sun to begin fusion
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15 million degrees celcius
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Cold Accretion Theory first step in cycle
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supernova explodes setting cloud of dust and gases spinning
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what happens after supernva explodes in cold accretion theory
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cloud flattens with protostar in center and planets surrounding (think galaxy)
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what makes planets and sun grow in cold accretion theory
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gravity and accretion
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what blew away the inner planets’ (rock planets) first atmosphere
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fusion of sun created ions that blew it away
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what was mostly in early atmosphere
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hydrogen and helium
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where did early atmosphere
be blown to? |
further out into the Solar System where it was captured by the Gas Giants )(gas planets)
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in cold accreation theory, what caused sun to stop spinning
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fusion of the sun
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fusion
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heat (chemical) reaction combining two or more elements...
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in cold accreation theory, what makes planets spin
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fusion of sun and blast of ions
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another name for our sun
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Sol
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does accreation still occur or exist in our solar system
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yes it is continuous
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what caused planets to consolidate or combine),made planets collide and lasted until 384 million years ago
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Continued Accretion
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caused the melting and reformation of the planets and variation in orbits and tilts
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planets colliding
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ADDITIONAL BIG BENEFIT OF ACCRETION
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earth has seperate core, mantle and crust
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why is seperate core, mantle and crust
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land(dirt)renews itself by shifting Plate Tectonics, renews soil and crust, has an atmosphere, and ocean floor renews/recycle
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gives earth a magnetic field
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differentiated core
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purpose of magnetic field
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protect us from the Sun’s solar wind
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