The earth is flat.
No. The earth is round. You can tell by the slight curvature on the horizon. You can fall off the side of the earth.
I guess, but not in the way that you're thinking. You would have to get out of the atmosphere and even then the earth has its gravitational pull. Energy and life can pop up anywhere.
No. Energy can only be converted, not created or destroyed, and living things can only be created by other living things. You're crazy!