I think I remember learning this a few years ago. If you mean a hard boiled egg, when heated in water, air bubbles escape through tiny holes in the egg's shell.
-Rocklegend51
Heat control is very important while frying an egg as over heating might result to change in taste,appearance and the egg might also burn from the bottom and sides.
The traditional riddle asks, "Which came first, the chicken or the egg?" It's a philosophical question about causality and evolution, with no definitive answer. Some argue the egg came first due to evolutionary processes, while others believe the chicken must have existed first to lay the egg.
Egg
egg
The egg.
the egg!
my answer
Cooking an egg is a chemical reaction because of how the proteins of the egg change through the heating process. The heating of the egg white, for example, converts the amino acids to a different protein arrangement that is of bound texture.
"Which came first, the chicken or the egg?" is a famous riddle that has no answer.
Water solidifies into ice after being heated and then cooled back down.
It came from a chicken who came from and egg which came from a chicken which came from an egg...and so on until a chicken-like ancestor in the wild was domesticated and made the "first" chicken. It's evolution.
The hen's egg came first because other animals layed the egg!!!!