It has to harden
Few earthquakes happen in the earths mantle do to the fact that the mantle has a folded deformation. This means that the amount of pressure on the mantle caused it to deform.
because of the folded deformation
The flow of hot rock in earths mantle will stop and Earth's magnetic field will disappear
there are 7 layers in earths mantle.
the convection currents will stop
They'd stop moving.
in the mantle above the slab
the mantle
the earth's mantle is brown
mantle
you will find it in earths mantle because it is a kind of an igneous rock
the earths mantle is very hot were cornstarch is not hot at all