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6th grade es

lithosphere the solid outer layer of the earth that consist of the crust and the ridgid upper part of the mantle.
inner core the solid dense center of our planet that extends from the bottom of the outer core to the center of the earth.
outer core the liquid layer of earths core that lies beneath the mantle and surrounds the inner core
normal fault forms when rocks are pulled apart because of tension.the hanging wall moves down relative to the footwall
reverse fault happens when rocks are pushed together by compression. The hanging wall moves up realtive to the footwall.
strike slipfault forms when opposing forces cause rock to break and move horizontally.
boundary a place where tectonic plates touch.
Pangaea Wegener theory that all continents were all formed into one super super continent.
sea floor spreading the process by which new oceanic litoshpere forms as magma rises towards the surface and solidifies.
mid ocean ridges under water mountain chains that run through earths ocean basins.
convergant boundary the boundary formed by the collision of two lithospheric plates.
divergent boundary the boundary between two tectonic plates that are moving away from each other.
transfrom boundary the boundary between tectonic plates that are sliding past each other horizontially.
uplift the rising of regions of the earths crust to higher elevation.
subsidence the sinking of regions of th Earth's crust to lower elevations.
folding the bending of rock layers due to stress.
compression stress that occurs when forces act to squeeze and object.
tension stress that occurs when forces act to stretch an object.
magma hot liquid rock.
seismograph measures the time at which seismic waves arrive at different distances from an eathquake.
fossils the remains or physical evidence of an organism preserved bh geological processes.
magnetic reversals when earths magnetic poles change places.
Global positioning system a system of satellites used to measure the rate of tectonic plate movement.
Created by: 3cheers