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Earths Core

Science Project
by

Josh Baker

on 24 September 2013

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Transcript of Earths Core

Inner Core
The inner core is at the center of the earth. It is a solid ball, estimated to have a radius of around 1220 kilometers, and it is made out of mostly iron and nickel (in the solid state). The inner core is estimated to reach 5000 - 6000 degrees Celsius. It is believed that the inner core is too hot to hold a magnetic field.
Outer Core
The outer core is found
about 4800 km below the earths
surface. It is estimated to reach
between 2200 - 5000 degrees
Celsius. The outer core is made
from iron, gold, nickel and
lighter things in their liquid
states. The earths magnetic . field is believed to come . from this outer core.
Mantle
The Mantle is the layer second from the surface of the Earth. It exists from the bottom of the Crust (about 75 km down) to roughly 2900 kilometers down. It is made of iron and nickel in their liquid states. However unlike the outer core, it is a highly viscous liquid, meaning that it is almost solid and flows very slowly. The temperature of the mantle ranges from 500 to 900 degrees Celsius.
Crust
The earths crust is everything from the surface down to 75 kilometers. It is the coolest of the four layers, and sits on top of the mantle. It is the right temperature to sustain life and is made of solid materials.
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