The earth's crust is all the ground that we see on a daily bases, hills, oceans, mountains, waterfalls, everything on top. The core is the extremely hot center of the earth. The mantle is all the...
It is because heavier compounds settled at the core due to gravity while lighter ones floated above when the whole mass of earth was is molten state.
No, both the core and mantle are more dense than the crust. The crust is the least dense layer.
The mantle is more dense than the crust but less dense than the core.
The geosphere.