Why moutain is in earth ?

Long ago when dinosaurs didn't exist yet , when its just the beginning of the earth's creation , when the bunch of meteors attacks the earth and etc. and sun radiation starts to hit the earth that form the ozone layer , mountains and some animals start to grow.
>you can also watch how its done on youtube :) <
I think i reverse some of the words but , don't worry i think that's how when the mountains is in the earth. Their also some mountains on the other planets too :)