third paragraph: scientists have confirmed Earth's outer core is liquid

third paragraph: scientists have confirmed Earth's outer core is liquid.

fourth paragraph: Scientists have confirmed that Earth's inner core is solid, and the inner components. The average density of Earth's great, but the average density of surface material is small, so scientists theorize that the Earth's inner dense. According to the inner density, scientists infer that the inner earth metal, components of a mixture of iron and nickel, but under the pressure of the deep Earth, the density of iron and nickel than the actual value of the mixture, so the inferred depths of the Earth's core there Other elements: for example, silicon and the like. Some meteorites inner earth elements like composition and inference of these meteorites came from another planet, the disintegration of the kernel.

last paragraph: how the formation of the Earth's magnetic field. Earth's liquid outer core of the movement, with rotation of the earth, causing the movement of core electron flow, resulting in magnetic field.

with the original

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