Water Depth and Smooth Earth ```Name: Gillard Status: Other Age: N/A Location: 20s Country: United States Date: November 21, 2005 ``` Question: If the earth was a perfect smooth sphere how deep would the water level be? Replies: The average radius of the earth is about 6400km. The volume of ocean water ( the major source of water on earth -- see the interesting web site: http://ga.water.usgs.gov/edu/earthwherewater.html is about 1.3x10^9 km^3. If the earth were a smooth sphere with a shell of water, the average depth dR = dV/ 4 x pi x R^2 where dR is the average depth, pi = 3.14, R = 6400km. Plugging in the numbers gives a depth of about 2.5 km. (~ 1.6 miles). Vince Calder Click here to return to the Environmental and Earth Science Archives

NEWTON is an electronic community for Science, Math, and Computer Science K-12 Educators, sponsored and operated by Argonne National Laboratory's Educational Programs, Andrew Skipor, Ph.D., Head of Educational Programs.

For assistance with NEWTON contact a System Operator (help@newton.dep.anl.gov), or at Argonne's Educational Programs