EESA06H3 Lecture Notes - Internal Energy, Environmental Geology, Scientific Method
8 May 2012
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Document Summary
What was the early earth like: earth collided with a planetismal, earth was bombarded by meteorites, meteorites left craters on earth, accretion allowed the planet to melt, accretion caused heavier material (iron/nickel) to settle toward the planet"s centre. Differentiation of the earth (diagram page 14: earth melts and minerals are mixed. Iron-nickel begins to settle toward centre: nickel-iron core, liquid outer core, density mantle, light rock crust. Meteorites small solid particles of rock, metal, and ice orbiting the sun. Meteors when meteorites enter earth"s atmosphere aka shooting stars. Internal structure of the earth (diagram page 16) Lithospheric plates - formed with the earth"s mantle breaks the crust. Asthenosphere part of the upper mantle where the lithospheric plates are pushed around the surface (diagram page 16: oceanic crust, continental crust, uppermost mantle (solid, asthenosphere (part of mantle) Outgassing water and gaseous elements released during volcanic eruptions.
