by Jaylee Holland

Inner Core 800 miles thick almost entirely composed of iron extremely hot, but the pressure keeps the

iron from melting 12,000 degrees Fahrenheit

Outer Core 1,300 miles thick composed mainly of a nickel-iron alloy metal is molten 9,000 degrees Fahrenheit

Mantle average thickness of about 1,800 miles contains the asthenosphere The upper mantle and the crust compose the

lithosphere. composed mainly of ferro-magnesium silicates This is where most of the internal heat of the

Earth is located. Makes up 80% of earth's volume 4,500 degrees Fahrenheit

Crust 5-30 miles thick composed of basalt and granite The temperature average in the crust is 900

degrees Fahrenheit.