Plate Tectonics controls the landscape of the Earth. The Earth’s crust is divided into plates and these plates are constantly moving.  Plates consist of continental crust and oceanic crust. Continental crust is less dense than oceanic crust. In places, continental plates are being split apart, (Red Sea & Africa) and in others they are crashing together (Indian Plate and Eurasia). Pulling apart of plates creates oceans, crashing together of plates creates mountains.  In some places new oceanic crust is being created, and in some places, it is being destroyed as it sinks below continental plates.