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Earth as sphere

  1. Jul 17, 2009 #1
    if we remove all of earth's seas and oceans it would no longer be a sphere,since the water all over covers it ,it appears a sphere,right?
     
  2. jcsd
  3. Jul 17, 2009 #2

    DaveC426913

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    The oceans are a mere 2 miles deep on average. On a sphere 7800 miles in diameter, that's chump change. The highest mountains and deepest oceans are proportionately no thicker than the skin is on an apple.


    Note though, that Earth is not a perfect sphere. It is an oblate spheroid, thicker around its equator than around its poles by about 60km, due to its rotation.
     
    Last edited: Jul 17, 2009
  4. Jul 18, 2009 #3
    well ,then even the world's deepest trench would appear too tiny on earth(without ocean) as a whole huge surface
     
  5. Jul 18, 2009 #4

    DaveC426913

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    Yep. At 6 miles, it is a mere 1300th of the Earth's diameter. On an apple, that would be a dent less than a tenth of a millimeter.

    Forget the apple, we're talkin' cueball.
     
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