tennisman if anyone knew that u could control fire they wouldn't get in ur way....i wouldn't. just like every other person who would run away from anyone who could control any element...
Definitely hydrogen! Then, I would be able to do almost anything, and light fires on a whim because of how flammable it is. I would pwn your earth, lufffi. I could just mess with the chemical composition, then take all the hydrogen out of the ocean so it would just be O.
but Earth is a name for a planet, ex. you don't call asteriod materal "earth", so any rock and rubble off the planet
But in terms of the classical elements earth is taken to be the ground and rocks etc. But hey I don't care anyway I wonder if Pliny the Elder found a meteorite he would have thought "hey look some Earth".