Answer:
The structure of the earth divides into three main layers, the core that is the innermost, the mantle, and the crust. The earth's crust is the last solid layer of the planet, it has a thickness of between 5km and 70km.
It is the thinnest layer compared to the others that have thicknesses of hundreds to thousands of kilometers.
The crust is also the least dense layer compared to the mantle and the core.
It has an average density of [tex]3g/cm^3[/tex], while that of the mantle is [tex]4.5g/cm^3[/tex] and that of the core is on average [tex]8g/cm^3[/tex].
