what layer of the earth do tectonic plates slide on
The Lithosphere The part of the land that is moving is the Earth's surface called the lithosphere. The lithosphere is made up of the Earth's crust and a part of the upper mantle. The lithosphere moves in big chunks of land called tectonic plates.Some of these plates are huge and cover entire continents.he lithosphere is made up of the Earth's crust and a part of the upper mantle. The lithosphere moves in big chunks of land called tectonic plates. Some of these plates are huge and cover entire continents.