Tectonic+Plates

Tectonic Plates Convection Currents is the way the molcules move underground. As you go deeper into the ground it becomes warmer. When warm air moves it goes to the colder temperatures first therefore making a process. Tectonic plates start to move when there is uneven cooling. When tectonic plates start to move a earthquake is formed. When teconic plates start to spread out the they make rifts and when magema breaks up old crust the spot begins to form into a volcano. 225 million years ago the continents where all a large mass called Pangaea. Continental Crust is the crust under land and Oceanic Crust is the crust that lays under the ocean. Continental crust is thicker than oceanic crust. Thus thats why contients stand higher up then the ocean but actually the land is just the thicker part of the plate. Convergent boundary is occurs where two plates are pushing toward eachother.