Fire, Water, and Earth are generally way to specific to be actual elements. Thats why I went with the 3-4 states of matter. Personaly I think the names relate to what we know pretty well, if you have a question feel free to ask. The elves I was thinking of would almost be Emerald City (from 'Wizard of Oz') inhabitants with pointed ears and probably taller, plus platinum-blonde hair and green-blue-violet eyes. Height would be average 6'1", at least that was my personal image.