Here's a bit more about them:

* Tectonic plates are massive, irregularly shaped slabs of solid rock that make up Earth's outer layer, known as the lithosphere.

* These plates "float" on the partially molten asthenosphere, the upper layer of Earth's mantle.

* They are constantly moving, very slowly, in a process called plate tectonics.

* These movements cause a variety of geological phenomena, including earthquakes, volcanic eruptions, mountain formation, and the creation of new ocean floor.

Let me know if you have any other questions about Earth science!