GEOLOGY

Detailed explanation-1: -Volcanoes often form a hill or mountain as layers of rock and ash build up from repeated eruptions. Volcanoes are classified as active, dormant, or extinct.

Detailed explanation-2: -Vent. Vent-The opening or place at Earth’s surface through which magma, rock fragments, and/or volcanic gases are emitted.

Detailed explanation-3: -A volcano is an opening in the Earth’s crust that allows molten rock, gases, and debris to escape to the surface. A volcanic eruption may release acid, gases, rocks, and ash into the air. Lava and debris can flow at up to 100 miles per hour, destroying everything in their path.

Detailed explanation-4: -The crater is the bowl shaped opening located at the top of the volcano. The crater is also the steep sided walls made of hardened lava that surround the main vent. Lava can flow from the main vent, but not all volcanoes eject large amounts of lava.

Detailed explanation-5: -Composite volcanoes are steep-sided volcanoes composed of many layers of volcanic rocks, usually made from high-viscosity lava, ash and rock debris. These types of volcanoes are tall conical mountains composed of lava flows and other ejecta in alternate layers, the strata that give rise to the name.