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: The '''inner core''' is [[solid]].
: The '''inner core''' spins due to [[Convection Current|convection currents]] in the [[Outer Core|outer core]] which generates the [[Earth]]'s [[Magnetic Field|magnetic field]].
====OCR====
:[https://www.amazon.co.uk/gp/product/0198359837/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359837&linkCode=as2&tag=nrjc-21&linkId=3c4229e8b023b2b60768e7ea2307cc6f ''Inner core, Earth, pages 244-245, Gateway GCSE Physics, Oxford, OCR '']