Question

The inner core is made up of solid -
i) iron and silica
iii) nickel and silicon
iron and nickel
iv) nickel and silica

Answer 1

Answer:

The inner core, which is about 750 miles thick, is made primarily of iron. Unlike the outer core, the inner core is mostly solid. ... With a gigantic ball of solid metal as its core, all of Earth is magnetic. Scientists believe Earth's powerful magnetic field is controlled by the liquid outer core.

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