Ring of Fire:An extensive zone of volcanic and seismic activity that coincides roughly with the borders of the Pacific Ocean.
LAVA: Molten rock that reaches the earth's surface through a volcano or fissure.
MAGMA:The molten rock material that originates under the Earth's crust and forms igneous rock when it has cooled. When magma cools and solidifies beneath the Earth's surface, it forms what are known as intrusive rocks.
_Viscosity:THE STATE OF BEING THICK,STICKY,AND SEMIFLUID IN CONSISTENCY, DUE TO INTERRAL FRICTION.
Silica: Content;A chemical compound that is the main constituent of most of the Earth's rocks.