Вставьте слово
1)the earth's crust is made of over 50 tectonic plates that push and pull ti form mountains; and this happens so slowly that we don't even notice it.
2) fold mountains form two plates collide
3) the plates push against other and the edges fold upwards.
4) sometimes there is pressure inside a plate that makes it crack instead folding.
5) the pressure from inside the earth pushes the crust of one or sides of the fault line up
6) finally, dome mountains get their name because they look a dome, or the top half of a ball.
7) they are formed when hot melted rock (magma) under the earth's surface pushes up against the earth's crust without breaking it.