Legit question wrote:
Astronomers say the magical magnetism of gravity is what keeps all the oceans of the world stuck to the ball-Earth. ... A spinning wet tennis ball, for instance, has the exact opposite effect of the supposed ball-Earth!
Any water poured over it simply falls off the sides, and giving it a spin results in water flying off 360 degrees like a dog shaking after a bath. Astronomers concede the wet tennis ball example displays the opposite effect of their supposed ball-Earth, but claim that at some unknown mass, the magic adhesive properties of gravity suddenly kick in
You must be illiterate because I already explained how gravity works.
Scientists do not say gravity keeps the oceans on Earth. Antarctica does. The water flows downward and freezes there like an icicle. Some water still escapes but fortunately it is a slow process. Unimpeded gravity would rapidly drain all the water away, as happened on Venus and Mercury where it doesn't freeze.
Scientists have directly observed matter as it falls off the Earth:
http://earthobservatory.nasa.gov/IOTD/view.php?id=44348But matter is currently gained at the same rate, falling onto the north pole:
http://mashable.com/2015/03/18/astronauts-aurora-iss/#NXKXsqwpAgquIf this equilibrium is unbalanced by global warming melting Antarctica, Earth is doomed. Global warming deniers should be thrown in prison.
There is much more matter in the northern hemisphere as it accumulates there, because anything that drifts south of the equator is driven inexorably further southward by gravity. The few permanent landmasses in the south are rich enough in metals to stick to the Earth by magnetism, which, you see, is a different force than gravity and much stronger. Take a magnetic tennis ball and put some iron filings on the bottom half and spin it around as fast as you like, they will stay right there.