The document summarizes plate tectonics and tectonic plate boundaries. There are three main types of plate boundaries - convergent where plates move towards each other, divergent where they move apart, and transform where they slide past each other. At convergent boundaries, mountain ranges form at continental-continental collisions while subduction zones and volcanoes form at oceanic-continental and oceanic-oceanic collisions. New seafloor is created at divergent boundaries through sea floor spreading as magma rises between separating plates. Transform boundaries create earthquakes as plates grind past each other.