younger
thinner and denser
I'm not sure what you mean by egg model, but if your talking about an egg representing the Earth, the eggshell would be the crust because the egg white is the mantle and the yolk is the core.
Thin
The crust not under the ocean is called continental crust. It is thicker and less dense compared to oceanic crust and forms the landmasses on Earth's surface.
The "Crust" is one of the Earth's layer.It can be compared to an eggshell
The eggshell corresponds to the crust of the Earth. Both the eggshell and the Earth's crust are the outermost layers that provide protection and structure to what lies beneath them.
An eggshell is the hard, white or brown outside, or you could call it crust, that encircles the yolk and white of the egg.
younger
The relative thickness of the Earth's crust is similar to the relative thickness of an apple's skin compared to the apple itself. Both the Earth's crust and an apple's skin are thin outer layers in relation to the entire object.
thinner and denser
Iron and magnesium, when compared to continental crust.
I'm not sure what you mean by egg model, but if your talking about an egg representing the Earth, the eggshell would be the crust because the egg white is the mantle and the yolk is the core.
Eggshell
The lower crust is denser and more mafic in composition compared to the upper crust, which is less dense and more felsic. The lower crust is also usually deeper in the Earth's crust compared to the upper crust.
The eggshell is porous.
The composition of the continental crust is granitic overall, high in silicon and aluminum, when compared to the oceanic crust.