Lava refers both to molten rock expelled by a volcano during an eruption and the resulting rock after solidification and cooling.
The Ring of Fire is an area where a large number of earthquakes and volcanic eruptions occur in the basin of the Pacific Ocean.
Magma is a mixture of molten or semi-molten rock, volatiles and solids that is found beneath the surface of the Earth,
Intraplate Valcanism ,Although most volcanic rocks are generated at plate boundaries, there are a few exceptionally active sites of volcanism within the plate interiors. These intraplate regions of voluminous volcanism are called hotspots. Twenty-four selected hotspots are shown on the adjacent map.
the amount of silica content controls the viscosity,or thickness of the magma. the higher the silica level, the more viscous the magma is;therefore, the volcano eruption is greater and more explosive.
Viscosity ,The viscosity of a fluid is a measure of its resistance to gradual deformation by shear stress or tensile stress.