The structure of the earth is divided into four major components, the crust, the mantle, the outer core, the inner core, The crust is the outermost layer of the Earth, Graphic for Earth Structure Stock Video Footage - Alamy

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Earth's inner core is less solid, undergoes structural changes: Study

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Water discovered leaking from Earth's crust into the planet's core

Inner Core of the Earth | Composition, Characteristics & Facts