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Convergent Boundary a plate boundary at which plates move towards each other and collide http://o.quizlet.com/i/AzK4N4COpKpAEvVNQCbebg.jpg Divergent Boundary a plate boundary at which plates move apart http://o.quizlet.com/i/bTl3gFQsdRkJeNVwhbMoAg.jpg Pangea the name given to the theoretical land mass that included all the continents millions of years ago http://o.quizlet.com/i/iSg8QNBpa8v89XBuAfGRew.jpg seismic waves the energy waves released by an earthquake http://o.quizlet.com/i/xrpuIuAxJ6_l8qXmDN58Ng.jpg theory of plate tectonics a theory proposing that the plates of the lithosphere (crust and upper mantle) interact with each other http://o.quizlet.com/i/cWXQuvi_Ra-ndomQc4dk8Q.jpg transform boundary a plate boundary at which plates slide past each other http://o.quizlet.com/i/k2_9yfcDcGFXTtt0-5i8RA.jpg cinder cone volcano a volcano made of cinder (ashes) with steep sides and a bowl-shaped crater http://o.quizlet.com/i/dk0iIby2jgYUkn55mdksgQ.jpg composite volcano a volcano made of alternating layers of lava and cinder or ash http://o.quizlet.com/i/NbC9rz3fY1L-YlfMTKflNw.jpg dike a volcanic feature formed when lava flows across layers of rock and then hardens http://o.quizlet.com/i/tMfAxd7u-ZBtgtEZR0384Q.jpg dormant term used to describe a volcano that is not active http://o.quizlet.com/i/PpJGra-WwFhC7vwlrLZa8w.jpg earthquake shaking of the ground caused by the sudden release of energy that is stored in the bedrock http://o.quizlet.com/i/5xvZV9yiRIv5INuB16lxqA.jpg epicentre the place on the surface of the Earth that is directly above the focus of an earthquake http://o.quizlet.com/i/hJCd7wvEP1_hkAt94JzM7A.jpg erupt the term used when a volcano becomes active http://o.quizlet.com/i/EHIfr-K13VAHRnTl-BXfag.jpg fault a crack in the bedrock along which rocks break and move during an earthquake http://o.quizlet.com/i/Yl4QDRVOijONyrZM_7G56g.jpg bedrock the solid rock beneath the soil http://o.quizlet.com/i/Yp6Nc8hWYMfICQaq2wTMGA.jpg focus the place deep in the Earth's crust where an earthquake begins http://o.quizlet.com/i/hJCd7wvEP1_hkAt94JzM7A.jpg hot spot a place under the Earth's crust at which magma is forced up to the surface because the temperature is much greater than normal http://o.quizlet.com/i/O7ej_BduK8n798D4yV3yqw.jpg primary wave (P wave) the fastest of the 3 types of wave released by an earthquake; can pass through solids, liquids and gases http://o.quizlet.com/i/zXdSSXtzMss-PwRVZ6c8jg.jpg Richter scale the scale used to measure the strength of an earthquake http://o.quizlet.com/i/BaozaERhBasY2Fbm3dsfkA.jpg secondary wave (S wave) the second fastest wave released by an earthquake; can travel only through solids http://o.quizlet.com/i/FYjIbJCdig_4p7KQmyiQGQ.jpg seismogram the record of seismic waves detected by a seismogram http://o.quizlet.com/i/nuR3leNUYWZ_gba-vQC0uA.jpg seismograph the machine used to measure the strength of earthquakes http://o.quizlet.com/i/qceAHOwq1r7wdyI6lyOKaA.jpg shield volcano a volcano with gently sloping layers composed of cooled magma http://o.quizlet.com/i/6DYG4_r7zyxklCm6RPzotA.jpg sill a volcanic feature formed when magma flows parallel to rock and hardens http://o.quizlet.com/i/D-_uLSIZ-j3aN8V-n6ZsDQ.jpg surface waves the slowest moving but most damaging type of wave released by an earthquake http://o.quizlet.com/i/zXdSSXtzMss-PwRVZ6c8jg.jpg vent an opening in the Earth's crust through which magma can escape http://o.quizlet.com/i/D-_uLSIZ-j3aN8V-n6ZsDQ.jpg volcano an opening in Earth's crust that can release lava, smoke, and ash when it erupts http://o.quizlet.com/i/dlf1SEaeRFRKaZ80nt6xeQ.jpg 3 different types of volcanoes http://o.quizlet.com/i/EPzEepYgMByWhklQQIJ49A.jpg