the theory that explains how large pieces of the Earths outermost layer, called tectonics plates, move and change shape
plate tectonics
the boundary formed by the collision of two lithosphere plates
convergent boundaries
the boundary between two tectonic plates that are moving away from each other
divergent boundaries
the boundary between tectonic plates that are sliding past each other horziontally
transform boundaries
scientists use this system of satellites
global positioning system