The Lithosphere is also broken up into pieces, and these pieces of Earth are moving relative to the deep Earth and one another. This movement (on the order of a few cm per year) causes earthquakes and volcanoes and crustal deformation. Most of the activity is near the margins of the "plates".
Three types of plate margins exist:
Plate interactions produce changes in geology, volcanoes, earthquakes, etc. Over long periods of time, these actions create landscape. Landscape is in turn altered by climate and weather.