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1 April, 18:29

Describe the five layers of the earth by providing the following information for each layer:

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  1. 1 April, 18:50
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    Inner Core: solid, mostly Iron and Nickel, temperature up to about 13,000°F (7,200°C = 7,500 K), radius of about 750 miles (1,228 km).

    Outer Core: molten, about, mostly Iron and Nickel, 1,400 miles (2,260 km) thick. temperature about 3600 degrees C

    Lower Mantle: composed of silicon, oxygen, magnesium, iron, aluminum, and calcium. The lower mantle flows slowly, at a rate of a few centimeters per year. towards the bottom of the mantle, the temperature is about 4,000-6,700° F (2,200-3,700° C).

    Upper Mantle: composed of silicon, oxygen, magnesium, iron, aluminum, and calcium. The mantle is about 1,700 miles (2,750 km) thick. The mantle gets warmer with depth; the top of the mantle is about 1,600° F (870° C);

    Crust: The Earth's thin, rocky crust is composed of silicon, aluminum, calcium, sodium and potassium. The crust is thinner under the oceans (6-11 km thick). 31.15 km thick on average. Temperature: ~ 15 C (average on surface)
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