GEO 102 Lecture 22 Outline of Last Lecture I Study Guide Outline of Current Lecture II Time Scale to Memorize III Origin of the Universe IV Origin of the Sun and Earth V The Atmosphere Current Lecture Time Scale to Memorize Eons Hadean Archaen Proterozoic Phanerozoic Eras of the Phanerozoic Paleozoic Mesozoic Cenozoic Periods of the Paleozoic and Mesozoic Cambrian Ordovician Silurian Devonian Carboniferous Permian Triassic Jurassic and Cretaceous Origin of the Universe 13 75 billion years give or take 0 11 o Initially inferred from expansion Doppler shif o Radiation remains cosmic background radiation o First true atoms formed 379 000 years afer Big Bang Origin of the Sun and Earth Matter from prior stars condensed gravity Planets accreted from rotating disk of matter Less volatile matter near sun stony planets less dense accreted farther gaseous planets Moon formed from early impact The Atmosphere Originated through outgassing 1st one mostly H was lost to solar wind These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute Core differentiation magnetism protect 2nd
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