How does a soft egg becomes hard?
you boil it in boiling water
A hard boiled egg is cooked until solid all the way through, a normal 'soft' boiled egg the centre yolk will still be runny, To test the egg you need to do is spin the egg on a flat surface, if the egg is soft boiled it will wobble because part of the egg is still liquid, if it is hard boiled it will spin on end, because the contents are solid.
Well its like trying to break an egg on cotton , will not break because it is hard against soft its like you trying to brake yourself on a bed, you cant once again, because its hard against soft. Now the reason an egg will not break on peanutbutter is because the peanutbutter is soft, and there you go now you know why you cant break an egg on peanutbutter.
A hard boiled egg is made of..... egg. It is simply a whole egg, in the shell that has been placed in boiling water. The heat causes the liquid egg inside the shell to become solid. The yolk of the egg becomes the yellow center, and the clear "white" of the egg becomes the white outer part of the boiled egg. Remove shell, add salt to taste, eat.