Question

The core of earth is made of iron and nickel the outer core is so hot that it melts metal. The inner core is solid. What causes these diffrences

Answer 1

The inner core is solid by intense pressure of all the layers above it.

Step-by-step explanation:

The inner core is made up of heavy elements such as iron and nickel. It therefore possesses an unusually high pressure that makes the expanded inner core which arose from effects of high temperature to be nullified.

Thus, we can say that the inner core is solid by intense pressure of all the layers above it.