The Ring of Fire is an area where a large number of earthquakes and volcanic eruptions occur in the basin of the Pacific Ocean.
Lava refers both to molten rock expelled by a volcano during an eruption and the resulting rock after solidification and cooling. Its also only called lava if its in the exterior of the volcanoe.
Magma is a mixture of molten rock, semi molten rock, and solids. It can Disolve gasses and cause gas bubbles
vulcanism are areas where concentrations of radioactive isotopes have accumulated and have created a magma chamber that forms volcanoes.
The viscosity of a fluid is a measure of its resistance to gradual deformation by shear strees or tensile strees
silica has a high viscosity, which means it is thick and flows slowly