The separate sections the lithosphere are broken into are called tectonic plates. The shifting of tectonic plates can cause volcanic eruptions and earthquakes.
The lithosphere never stops moving, and that phenomenon is called plate tectonics, but the movements do not always cause major eruptions, like volcanic eruptions and earthquakes. Plate tectonics is thought to be the source of Earth's continents. Scientists believe the Earth was once one land mass, which broke apart when the lithosphere shifted. One way to get an idea of the fact that it could be true, is to cut apart a paper map, and slide the pieces together. With the exception of a few gaps, which can be accounted for by land mass that is submerged in the oceans, the pieces fit closely together.