Would the Earth speed up rotating if the molten core solidified?

AI Thread Summary
The discussion centers on the effects of the solidification of Earth's molten core on its rotation speed and magnetic field. It posits that as the molten material solidifies, it will decrease in volume, potentially causing the Earth to rotate faster. However, it notes that the current slowing of Earth's rotation is primarily due to tidal interactions with the Moon, which may outweigh the effects of solidification. The conversation also touches on the composition of Earth's core and the reasons for volume reduction during solidification, with a request for further references and information on these topics. The thread concludes with a note that the original poster will be unavailable for ten days.
Prishon
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The question is simple. The molten stuff inside the Earth will get a smaller volume when it solidifies. Will the Earth increase its rotation speed in reaction to this? What about the magnetic field?
 
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Prishon said:
The question is simple. The molten stuff inside the Earth will get a smaller volume when it solidifies. Will the Earth increase its rotation speed in reaction to this? What about the magnetic field?
Can you please post some links with references about your question? How much of Earth's core is molten? What is it made up of? Why would it shrink when solidifying? And so on. Thanks for filling our your question further.

https://en.wikipedia.org/wiki/Earth's_inner_core
 
If Earth cools and shrinks it will tend to rotate faster. It is currently rotating slower due to tidal interactions with the Moon. I think the latter effect will predominate.
 
Looks like OP is on vacation for 10 days, so I'll go ahead and close this thread.
 

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