GEG 1301 Study Guide - Temperate Climate, Continental Crust, Landform
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GEG 1301 Full Course Notes
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Geg 1301 geological cycle and tectonics chapter 11 & 12. 6 major species extinction occurred in earth"s life time. Relative time: sequence of events based on the principle of superposition. Older is at the base and younger at the top. Absolute time: based on radiometric dating (radioactive isotopes) As earth solidified, gravity sorted material by density. Heavy substance slowly sunk to the center and lighter substances rose upward towards the surface. Earth interior is sorted into concentric layers of chemical composition or temperature. Heat energy moves from the interior surface by conduction and convection in fluid/plastic layers. Inner core: solid iron that is above melting point, but high pressure cause it to remain solid. Outer core: molten lighter density iron, the fluid outer core generates the earth"s magnetic field and the magnetosphere that protects the earth from comic radiation, it has been recorded that the magnetic field in the past reversed.
