* Convection Currents: The primary driving force is convection currents within the Earth's mantle. The mantle is a layer of hot, semi-solid rock. Heat from the Earth's core causes the mantle to heat up and rise, while cooler, denser rock sinks. This creates a circular flow of material, known as convection currents.
* Plate Movement: These convection currents drag the tectonic plates along with them. The plates are not just passively riding on top of the mantle; they are coupled to the currents.
* Types of Plate Boundaries: The interaction of these moving plates creates various features at their boundaries:
* Divergent Boundaries: Where plates move apart, creating new crust (e.g., mid-ocean ridges).
* Convergent Boundaries: Where plates collide, resulting in subduction (one plate diving under another) or mountain building (e.g., Himalayas).
* Transform Boundaries: Where plates slide past each other horizontally, creating earthquakes (e.g., San Andreas Fault).
In Summary: Plate tectonics is a complex process driven by convection currents within the Earth's mantle, which cause the Earth's tectonic plates to move and interact, shaping the planet's surface.
