Astronomy 10 10.3.06

Astronomy 10 10.3.06 - o Core Mantle Crust o Cores are...

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Astronomy 10 Differentiation 10.4.06 How objects heat up: o Condensation o Sunshine o Impact o Radioactive Decay Aluminum26 Nobody knows the half-life of aluminum26 o Tidal Stress Very weak Only important in Io and Europa o Magnetic Induction Very Weak Only important in Io and Europa Gravity is Boss!! o Object changes forever when it melts o 1100 C is the melting point for most celestial material Differentiation happens When something turns liquid, dense stuff sinks and light stuff floats Gravity making liquids flow according to their density Happens everywhere in the universe where liquid is in gravitational fields Different components differentiate at different speeds Happens with structure of the planets
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Unformatted text preview: o Core, Mantle, Crust o Cores are metal Iron and some Nickel • Iron structure only found in Meteorites due to heating and pressure, which is why all the crystals are so big The inner core is much denser, made of heavy metals that are probably radioactive o Mantle is made of a mineral called Olivine • A lot of the heavier elements are also radioactive o Most likely what the core is made of • Differentiation occurs as soon as a object heats up • The smaller an object is, the faster it cools off • Have asteroids and meteorites that are made of the different layers because they are the result of broken up non-differentiated Asteroids...
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This note was uploaded on 04/01/2008 for the course ASTRO 10 taught by Professor Norm during the Fall '06 term at Berkeley.

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