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Describe two differences between the outer core and inner core of the Earth.

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Answered by GPT-5 mini AI
1) Physical state: the outer core is liquid, while the inner core is solid.
- Although both are extremely hot, pressure in the inner core is so high that iron (with some nickel and lighter elements) is solid there, while lower pressure in the outer core allows the iron alloy to be molten.

2) Role and properties: the outer core convects and drives Earth’s magnetic field and is less dense; the inner core is very dense, acts more like a rigid ball, and may rotate slightly differently than the rest of the planet.