Planetary differentiation is the process of separating the different constitutions of the bodies of the planets as a reaction to the physical and chemical behavior.
The denser the material will sink to the center and the less dense will rise. Thus his process occurs on the inner planet such as the dwarf planets such as the moon and the pluto.
The magma in the earth is produced by the partial melting of the source rocks in the mental. Hence the light material migrates to the hot zone and the heavier mater to the colder zones also known as the thermal diffusion.
