* The Earth's Internal Heat: The Earth's core is incredibly hot, and this heat radiates outwards.
* Mantle Convection: The mantle, the layer beneath the Earth's crust, is made of semi-molten rock. The heat from the core causes this rock to heat up, become less dense, and rise. Cooler, denser rock sinks. This creates circular currents called convection currents.
* Plate Movement: These convection currents act like giant conveyor belts, dragging the tectonic plates along with them. Where the currents converge, plates collide, causing mountain ranges, volcanoes, and earthquakes. Where they diverge, new crust is formed.
In summary: The Earth's internal heat drives convection currents in the mantle, which in turn move the tectonic plates. This dynamic process shapes our planet's surface and creates many of the geological features we see today.
