the core of earth is made out of iron and nickel. The outer core temperature is so hot that its melts the metal. the inner core is solid metal. what causes these differences

the inner core makes up only 1% of the mass of the Earth; the outer core makes up about 32% of the mass of the Earth. Answer 2: The inner core is solid because it is made of very dense, or heavy, materials - like iron and nickel. Even though it is very hot, these materials don't "melt" very easily, so they stay solid.

Explanation:

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the answer is A because it keeps the temperature out

Explanation: