Which layer surrounds the inner core and is composed of molten iron and nickel?

Which layer surrounds the inner core and is composed of molten iron and nickel?

• A. Mantle
• B. Crust
• C. Inner Core
• D. Outer Core

Answer: (D)

The key idea is Earth's internal structure and the state of matter of its core. Around the solid inner core lies the liquid outer core, made of iron and nickel in molten form. That molten layer contrasts with the solid inner core and with the rocky mantle and crust outside it. The outer core’s liquid state allows convection currents that drive Earth’s magnetic field. So the layer surrounding the inner core that is molten iron and nickel is the outer core.

The key idea is Earth's internal structure and the state of matter of its core. Around the solid inner core lies the liquid outer core, made of iron and nickel in molten form. That molten layer contrasts with the solid inner core and with the rocky mantle and crust outside it. The outer core’s liquid state allows convection currents that drive Earth’s magnetic field. So the layer surrounding the inner core that is molten iron and nickel is the outer core.