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is the inner core solid liquid or gas what keeps it in this phase

Sagot :

The inner core of the Earth is made of a solid ball of metal which is composed of Nickel and Iron.

Although it is the hottest layer of Earth, this still remains in its solid state because of the pressure in the inner core. Metals like Nickel and Iron remains solid at higher temperatures provided that the pressure is still higher. Having these conditions, the effect of pressure override the effect of temperature resulting to a solidified inner core.