What happens when 2 tectonic plates collide?
when 2 tectonic plates collide it all depends on what type they are. If they are both osianic then the less dence one goes over the more dence one. If they are both continental then the collide and form a mountain.
mountains occur where tectonic plates collide When they rub against each other Plus it could be caused by two continental plates colliding as well. they occur mostly where 2 tectonic plates of the same crust (Continental or oceanic) met together at a conservative boundary (at a boundary where they both collide and go upwards) this is why mountains keep on growing, because the plates don't stop pushing.
It changes because when the 2 tectonic plates collide they form mountains and volcanoes. Also with Alfred Weigners hypothesis the continents are always moving Continental drift and subduction zones the tectonic plates along the earth. continental drift causes tectonic plates to either "pull apart" or "crash" into each other. plates that crash into each other either form mountains, or when one slides under the other (a subduction zone) volcanoes from. *see "Volcanoes" for further explanation)
Earths crust is made of several large tectonic plates. These plates slowly move in three ways. 2 plates may move along side each other, away from each other or toward each other. if 2 plates of equal density collide it will result in rocks being crumpled upward forming mountains. if one plate has less density then the other then the plate with more density will slide beneath the less dense plate