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

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SUMMARY

The discussion centers on the implications of Earth's molten core solidifying, specifically whether this would lead to an increase in the planet's rotation speed. It is established that as the molten core solidifies, its volume decreases, which theoretically could cause the Earth to rotate faster due to conservation of angular momentum. However, the current slowing of Earth's rotation is primarily influenced by tidal interactions with the Moon, which is expected to have a more significant effect than the solidification process. Additional inquiries regarding the composition and size of the molten core were also raised.

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  • Familiarity with tidal forces and their effects on planetary rotation
  • Basic geology concepts related to the solidification of materials
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  • Explore the composition and structure of Earth's core
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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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