earthquake

the sudden shaking or rolling of the earth due to a shift in the earth's plates


Eruption

An eruption is the sudden outpouring of lava coming out of a volcano.


Lava

material that erupts from a volcano that contains ash, cinders, and hot molten rock


Source
https://www.google.com/search?q=lava&biw=1262&bih=649&source=lnms&tbm=isch&sa=X&ei=xIFBVdi0BaPLsAS724CoBg&ved=0CAYQ_AUoAQ#imgrc=_C5os2vmrEhSMM%253A%3BwXB9_dEWV9E7SM%3Bhttp%253A%252F%252Ffc01.deviantart.net%252Ffs9%252Fi%252F2006%252F036%252F5%252Fe%252FFlowing_Lava_by_hitokirivader.jpg%3Bhttp%253A%252F%252Fwww.youtube.com%252Fwatch%253Fv%253D1LJCtYO1Yao%3B1280%3B960

Magma

hot, pasty rock that moves inside of earth's mantle


Source
https://www.google.com/search?q=lava&biw=1262&bih=649&source=lnms&tbm=isch&sa=X&ei=xIFBVdi0BaPLsAS724CoBg&ved=0CAYQ_AUoAQ#tbm=isch&q=magma+chamber&revid=1920478539&imgrc=-ORimAH_fD7mvM%253A%3BVDsBWefG7WZewM%3Bhttp%253A%252F%252Fwww.geology4today.com%252Fuploads%252F1%252F8%252F1%252F6%252F18166011%252F5651434_orig.jpg%253F1403369195%3Bhttp%253A%252F%252Fwww.geology4today.com%252Fthree-major-rock-types.html%3B640%3B360