In the Earth, we find tectonic plates in the lithosphere, which is the outermost layer of the planet. The lithosphere comprises the crust and the uppermost mantle, divided into multiple plates that float on the semi-fluid asthenosphere below. The movements and interactions of these tectonic plates are responsible for a range of geological phenomena, including earthquakes, volcanism, and the formation of mountain ranges, significantly shaping the Earth's landscape over geological time.