Earth Sciences 2240F/G Lecture Notes - Lecture 2: Pangaea, Hugo Benioff, Tangled
9 Nov 2016
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Inner core: hot, solid, and made up of pure metal, 6370km away. Outer core: similarly hot as the inner core but liquid, made up of pure metal. Mantle: consist of dense silicate and oxide minerals, large volume, three zones: Thin zone of the same composition as mesosphere. Lithosphere thin layer that is cold and brittle and stuck to the. Differentiation the process of heavy material moving to the planet(cid:495)s core and (cid:884). (cid:882) earth(cid:495)s internal heat energy. Earth(cid:495)s interior is estimated to be 7(cid:884)(cid:882)(cid:882) -7500 c. More than 1000 c higher than the sun(cid:495)s outer layer. Earth(cid:495)s mass grew as more material accreted and kinetic energy liberated: thin outer shell, topped off by oceans and atmosphere. Crust lighter material outward: m is mass and v is velocity. Researcher estimated that 1000km radius = 1000 c body temperature: from heat impacts, earth would have melted completely. Moon formed from debris when theia crushed into earth.
