Convection currents resulting from the heat from radioactive decay move the lithospheric plates.

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Convection currents resulting from the heat from radioactive decay, as well as other sources of heat in the Earth's interior, are believed to be a major driving force of plate tectonics. These convection currents occur within the mantle, which is the layer of hot, plastic rock that lies beneath the lithosphere, or the solid outermost layer of the Earth that includes the crust and uppermost part of the mantle. As the hot, less dense material rises and the cooler, denser material sinks, it creates a circular motion that drags the lithospheric plates along with it. This process is known as mantle convection and is responsible for the movement of the tectonic plates that make up the Earth's surface.

Convection Currents Resulting from the Heat from Radioactive Decay Move