The one my teacher used was the billiard ball, and told us "if the Earth were the same size as this, it would be smoother". A quick google suggests that is inde

The one my teacher used was the billiard ball, and told us "if the Earth were the same size as this, it would be smoother". A quick google suggests that is indeed true, but it would not be rounder. (http://blogs.discovermagazine.com/badastronomy/2008/09/08/ten-things-you-dont-know-about-the-earth http://blogs.discovermagazine.com/badastronomy/2008/09/08/te...)