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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.
Best Answer: Hi Deidara, The layers of the Earth starting with the core of the Earth are the Inner core which is made of solid iron and nickel. That layer which is the inner most is solid and it is about 1300 km in diameter. Then there is the outer core which is made of liquid iron and nickel and it is about 2250 km thick. This would mean that this layer of the Earth is liquid. Then the next layer is the mantle.. The mantle is about 2800 to 3200 km thick and it is made of silicon, oxygen, iron and magnesium. Then finally the layer we live on is called the crust. The crust is about 10-70 km thick (average 32 km thick) and this layer contains oxygen, silicon and aluminum.