Your description seems to be referring to the process of convection currents in Earth's mantle, where heat is transferred through the movement of solid materials. In the Earth's mantle, which is a layer beneath the Earth's crust, heat generated from the core rises through the mantle, causing the molten rock to move in slow convection currents. This movement is driven by the heat from the Earth's interior. The rising and sinking of material in these currents play a crucial role in the Earth's geological processes, including plate tectonics.