Volcanoes
a mountain having a crater or vent through which lava, rock fragments, hot vapor, and gas are being or have been erupted from the earth's crust
volcano
crack along which movement takes place
fault
the largest layer of the Earth that is beginning to melt
mantle
a volcano that has not erupted for a long time, but may erupt again one day
dormant volcano
sudden energy release that goes with fault movement
elastic rebound
the hottest layer of Earth that is made mostly of solid nickel and iron
inner core
a volcano that is erupting or has shown signs that it may erupt in the near future
active volcano
point of origin of an earthquake
focus
the layer of the Earth that is made mostly of liquid nickel and iron and spins around the inner core
outer core
the opening through which molten rock and gas leave a volcano
vent
point on Earth's surface directly above an earthquake's focus
epicenter
the mass of an object compared to the size or volume of that object
density
a bowl-shaped opening at the top of a volcano
crater
stress
friction
the outermost layer of the Earth that is made up of the continental and oceanic parts
crust