![]() It is very thin in comparison to the other three layers. The Earth's Crust is like the skin of an apple. The Outer and Inner Cores are hotter still with pressures so great that you would be squeezed into a ball smaller than a marble if you were able to go to the center of the Earth!!!!!! The mantle is much hotter and has the ability to flow. The crust is the layer that you live on, and it is the most widely studied and understood. ![]() Because of this, the crust is made of the lightest materials (rock- basalts and granites) and the core consists of heavy metals (nickel and iron). Many geologists believe that as the Earth cooled the heavier, denser materials sank to the center and the lighter materials rose to the top. The Earth is composed of four different layers.
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