More specifically, plate tectonics is the theory that explains how the Earth's outer layer (the lithosphere) is divided into large plates that move and interact with each other. These movements cause various geological phenomena like:
* Earthquakes: Occur when plates slide past each other, collide, or pull apart.
* Volcanoes: Form when magma from the Earth's mantle rises to the surface.
* Mountain ranges: Form when plates collide and push up the Earth's crust.
* Ocean trenches: Form when plates collide and one plate subducts (slides) under the other.
So, while there are other forces at play within the Earth (like gravity and the Earth's internal heat), tectonics is the primary force driving the movement of the Earth's solid parts.
