convection		stress that occurs when two tectonic plates pull apart from each other
subductionzone		stress that occurs when two tectonic plates collide
folding		boundary where the tectonic plates move away from one another
tension		fault formed when there is tension
divergent		formed along the divergent boundary in the middle of the Atlantic Ocean
crust		fault usually caused when tectonic forces push rock together
mesosphere		made primarily of Fe and Si, makes up most of the Earth's mass
convergent		tectonic plate boundary involving the collision between two tectonic plates
outercore		layer of the Earth that is liquid
core		process by which hot material from deep within the Earth rises while cooler material near the surface sinks
tectonicplates		slightly larger than Mars, center of the Earth
asthenosphere		solid middle layer of the Earth located between the asthenosphere and the outer core
fault		outermost layer of the Earth made primarily of silicon and oxygen
compression		occurs when rock layers bend due to stress
reverse		pieces of the lithosphere
midoceanridge		layer of the Earth just below the lithosphere
mantle		region where oceanic plates sink down into the asthenosphere
normal		the surface along which rocks break and slide past each other