Intraplate volcanism- Is a earthquake that occurs in the interior of a tectonic plate, where as an interplate earthquake is one that occurs at a plate boundary.
Ring of Fire- a area where a large number of earthquakes and volcanic eruptions occur in the basin of the Pacific Ocean.
Lava - molten rock from a volcano during an eruption and the remaining rock after solidification and cooling.
Magma- mixture of molten or semi-molten rock, volatiles and solids that is found beneath the surface of the Earth.
silca content- magmas are assessed partly based on silica content, or the amount of silica in them.
Viscosity - fluid measure of its resistance to gradual deformation by shear stress or tensile stress.