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The Earth is composed of several distinct layers, each with unique properties and composition. This structure includes the crust, mantle, outer core, and inner core. The crust is the thin, rocky surface we live on, while the mantle is a thick, semi-solid layer that flows slowly over time. The outer core consists of liquid metal, and the inner core is a solid sphere composed mainly of iron and nickel. Understanding these layers is crucial for studying geology, volcanism, and the Earth's magnetic field.
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