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

[Prishon]

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?

 

[berkeman]

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

 

[Keith_McClary]

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.

 

[berkeman]

Looks like OP is on vacation for 10 days, so I'll go ahead and close this thread.