Properties - The surface of Earth is constantly changing...

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Properties, Interior, Surface Surface crust  is mainly silicate rocks crust  broken into  plates  which float on  mantle => plate tectonics (continental drift)   convection  = hot fluid rises, cold fluid settles    plates move about 1 inch per year continental drift leads to mountains, earthquakes and some island chains:    
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    CD: Planets / Earth / Animations: "Plate tectonics caused by convection" and "Plate  motion over time" animates this. Surface changes
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Unformatted text preview: The surface of Earth is constantly changing from 1. continental drift 2. water (rain, rivers) = erosion 3. wind = erosion 4. chemistry - water and air react with rock If a spaceship landed on Earth and sampled the soil, age would be millions of years. The oldest rocks on earth, however, are billions of years old. So we need to be careful about judgements we make from examining surfaces...
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This note was uploaded on 03/09/2012 for the course AST 1002 taught by Professor Emilyhoward during the Spring '10 term at Broward College.

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Properties - The surface of Earth is constantly changing...

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