How does the mantle material get energy to move in covection currents?

Mantle material gets energy to move in convection currents primarily from the heat generated by the Earth's core and the decay of radioactive isotopes within the mantle itself. This heat causes the mantle to become less dense and rise, while cooler, denser material sinks. As the hot material moves upward, it creates a cycle of rising and sinking, which drives the convection currents. These currents play a crucial role in tectonic plate movement and geological processes.