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Which statement is correct for the outer core?

Answer and explanation

Correct answer: It is a liquid metallic layer

Direct answer: Option D is correct. Earth has an outer core between the mantle and the inner core. It is made mainly of metallic material, especially iron and nickel, and the extremely high temperature keeps it in a liquid state. Movement of this liquid metal is associated with Earth’s magnetic field. A is wrong because granite is a light rock found mainly in continental crust, not the outer core. B is wrong because the crust is Earth’s outermost solid layer; the outer core is deep inside. C is wrong because the atmosphere is the gaseous envelope surrounding Earth, far above the crust. D correctly identifies both the important state, liquid, and composition, metallic material. Memory cue: outer core means liquid metal; inner core means solid metal.

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Outer CoreLiquid MetalEarth Core

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