True or false: oceanic crust is denser then continental crust because it is comprised of silica.

Yes oceanic crust is denser than continental

Because continental crust is less dense than oceanic crust it floats higher on the mantle, just like a piece of Styrofoam floats higher on water than a piece of wood does. The mantle, oceanic crust and continental crust have different densities because they are made of different kinds of rock with different densities. TRUE