[Theo]

The gravity part? Not sure I understand. You mean about why particles of water float in the sky? Hm. Not sure why clouds float.

Perhaps all the water went into the oceans. Perhaps with the flood, the tectonic plates shifted dramatically, spreading the continents apart and creating oceans.

Maybe the thing that caused the fossils in their various layers (and trees jutting through the layers, the thing that caused the continents to spread apart, the thing that turned the palm trees and mammoths into ice on the North Pole, seashells on tops of mountains, and people to live only 100 or so years was the flood? Not sure, but it does seem consistent with science and with Scripture.

[Junior]

...the thing that turned the palm trees and mammoths into ice on the North Pole...

Ahem. Citations, please. There is no land at the north pole, so therefore there would be no palm trees and definitely no mammoths.

[Library Lady]

Have you read The HAB Theory by Alan Eckert? It is in novel form, but takes the theory of a pole shift being behind a great many unexplained geographical mysteries. Unfortunately it is out of print, but you may be able to get it through interlibrary loan as I did.