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. <u>TRUE</u>
Ecological succession is the process in which a community changes through time. Primary succession occurs in an area that has never before been colonized.
