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Astro Exam 3 Notes (97% in the course

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Department
Astronomy
Course
ASTR 1101
Professor
All Professors
Semester
Winter

Description
Earth10252011ChemicaldifferentiationIronanddensechemicalssinktocenterandlessdensematerialsfloatupAsaresultofdifferentiationtheearthhasthelayeredstructurethatweseetodaySeismologyTwodifferentwavesthatgothroughtheearthLongitudinalwavetravelsinsamedirectionasmotionTransversemoveperpendiculartothemotionupdownDonttravelwellinfluidsThemantleislargelysolidbecausethemeltingpointishotterthanthetemperatureinsidetheplanetContinentalDriftAlfredWegener1915continentaldriftjigsawpuzzleMidAtlanticRidgeseafloorspreadingPlateTectonicsHeatpushesupformthecoreseparatingtheplatesEarthquakeslargelycomefromtectonicplatesmovingagainsteachotherConvectionwithintheearthConvectionmoveshotwaterformthebottomtothetopwhereitcoolsmoveslaterallysinksandwarmsandrisesagainRadioactiveDecayAsEarthsradioactiveelementsdecaythereislessheatingoftheinteriorandplatetectonicsstartsslowingdownWhatpowersplatetectonics238UraniumOverwhelmingconfirmationMeasurementofcontinentsmovingapartegwithGPSlaserrangingAgesofseafloorrocksgetyoungerandyoungerthenearerthemidoceanridgeNeutrinosfromradioactivedecaysinsideEarthVerydetailedmodelsofthephysicsofEarthPlateTectonicsonVenusWedoseevolcanoesonVenusbutthisdoesnotimplyplatetectonicsPlateTectonicsonMarsWedoseevolcanoesonMarsbutthisdoesnotimplyplatetectonicsThreevolcanoesinarowlikeHawaiiweakevidenceMagneticstripeslikeAtlanticmoderateevidenceforsmallamountoftectonicslongago
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