Does it take more Gravity Pressure to hold the Earth or the Moon into shape they are in?

Answer 1

It seems we have an adequate amount of gravity to keep the earth and the moon round

Answer 2

Any collection of matter more than a certain size (roughly 1/4th of the Earth's diameter) will pull itself into a sphere through gravity. Once the collection of matter reaches that size, it's a sphere -- doesn't matter how much bigger it gets, it'll still be a sphere. Put it this way: earth has greater gravity than the moon (because it has more mass), but even if the earth stayed the size it is, and only had the moon's mass (it would have to be made of very light "stuff," but it's possible), it would still be a sphere. Both bodies have sufficient gravity because of their mass to hold them in the spherical shape they're in.

Answer 3

Actually, it's not a perfect sphere at all. The earth spins quickly (roughly 1000 Miles per hour) this spin makes the equator region bulge outward, it's called a centrifugal force.