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Ch. 17 science vocab

Chapter 7 science vocab

tectonic plates huge pieces that divide the lithosphere.
continental drift the theory that continents can drift apart and have done so in the past.
sea-floor spreading the process by which new oceanic lithosphere forms at mid- ocean ridges.
plate tectonics the theory that the lithosphere is divided into tectonic plates that move around on top of the asthenospere.
convergent boundaries when to tectonic plates collide.
transform boundaries when two tectonics plates slide past one another.
divergent boundaries when two tectonic plates divide.
subduction zone the region where oceanic lithosphere sinks into the atmosphere.
stress the amount of force per unit area that is put on a rock.
strain any change in a rocks shape or volume caused by stress.
uplift the rising regions of Earth's crust to higher elevation.
subsidence the sinking of regions of Earth's crust to lower elevation.
Created by: MadelynI