The Earth's inner core is primarily composed of which elements?

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Multiple Choice

The Earth's inner core is primarily composed of which elements?

Explanation:
Iron and nickel dominate Earth's inner core. Early differentiation pulled dense materials toward the center, forming a solid metallic core under immense pressures. Seismic data and high-pressure experiments show velocities and densities consistent with a mostly iron-nickel alloy, with nickel present as a significant but smaller fraction. Silicon and oxygen, by contrast, make up silicate rocks of the mantle and crust, not the core, and copper and zinc are not major core components. So the inner core is primarily iron with nickel.

Iron and nickel dominate Earth's inner core. Early differentiation pulled dense materials toward the center, forming a solid metallic core under immense pressures. Seismic data and high-pressure experiments show velocities and densities consistent with a mostly iron-nickel alloy, with nickel present as a significant but smaller fraction. Silicon and oxygen, by contrast, make up silicate rocks of the mantle and crust, not the core, and copper and zinc are not major core components. So the inner core is primarily iron with nickel.

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