How is the crust different from the other layers of the earth? a) it is hotter. b) it is thinner. c) it is mostly liquid. d) it is under pressure. earth's layers formed as result of differentiation. during differentiation, different zones of elements form layers and today we know these layers are made up of different elements. certain elements sunk to the center while others collected near the surface. we might predict that the elements, like iron and nickel, formed the core. a) more dense b) least dense c) light weight d) first crystallized