IF Earth were the Size of Saturn, would the gravity of Earth force all the 02 into the ground?...?

Question

And NOBODY be alive? Nothing be alive?

Answer 1

Saturn is a gas giant that doesn't have much O2. It has a rocky core but is mostly made hydrogen and helium, which would be gases on earth. But on Saturn the temperature is much colder and the weight of these substances also compresses them so that they are largely in liquid or even solid form. There isn't an obvious "ground" as there is on earth or other rocky planets. There is kind of a gradual change from the solid core to the gaseous atmosphere, with liquidy or semi-gaseous states between.
If Earth were the size of Saturn, but with the same proportions of elements that Earth had before life developed, life would not develop, at least not as it is now. Green plants made most of the O2 that now exists on Earth, and they could not live on a planet with the gravity of Saturn. As on Saturn, the "gases" would mostly be in liquid (or solid) form, due to gravitational pressure. They would not be able to react the way they do on our Earth.
There would be no animals or people because there would be no O2 to speak of.
I have no idea whether another kind of life, completely different from what we know, could live under those circumstances.