What will happen when the earth's core cools?

It’ll be a few billion years before this happens so I’ll keep my concern at a minimum…
(thinks about how the recession is affecting her finances again)

All the things that have been waiting for hell to freeze over will suddenly happen, all at once.

I will finally be able to chill my beer in the sand.

Wouldn’t that be the end of the world? Or at least an ice age?

I reckon the magnetic field would collapse.

it won’t, flares from the sun will destroy our atmosphere rather quickly due to the loss of our planet’s magnetic field. you’d to be several miles underground supplying yourself with oxygen.

I remember hearing that the tectonic plate movement would stop, among other things.

@Sarcasm I would have expected more from you. This was covered off in the details of the question.

@RareDenver You should know by now that I don’t read descriptions, just titles.

@Sarcasm all about the “up front”, can’t you see the person behind the tits?

Aaron and Eckhart and Hilary Swank will save the day.

It’s not going to happen. Before any of the above disasters, mankind will have long ago learned how to use teleportation, and make whatever living arrangements are desired.

I guess Al Gore and his descendants will be happy by then.

Isn’t the Earth large enough to have the gravity needed to keep the core molten?

Geological freeze. No more plate tectonics i.e. no active volcanoes and earthquakes. Just like on the moon and Mars.

@AstroChuck – Gravity as such cannot keep the core molten when there’s an equilibrium. Earth doesn’t really shrink and therefore cannot transform kinetic energy into heat (unlike the situation when Earth was being formed). So right now it’s radioactive decay creating the heat inside the Earth.