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Layers of the Earth. The earth is made up of layers (crust, mantle, outer core, and inner core). Each one has a unique make-up to it. Crust. This is the outer layer of the Earth about 10 miles or so thick. Mostly made up of rock and loose material.antle. The next layer beneath the crust is called the mantle. It extends to a depth of approximately 1,800 miles and is made of a thick solid rocky substance that represents about 85% of the total weight and mass of the Earth.
There are multiple layers of the Earth. The Earth layers are: the crust, the mantle, the outer core, and the inner core. Some of the layers are considered to parts of the lithosphere and others are part of the asthenosphere.Each layer has its own properties, make-up, and characteristics.here are two very distinct parts of the core: the outer and the inner core. The outer core is 2300 km thick and the inner core is 1200 km thick. The outer core is composed mainly of a nickel-iron alloy, while the inner core is almost entirely composed of iron.