what does volcano mean?

Question

Im doing a report in school about volcanos and i dont know what it means.

Answer 1

Volcano is an opening in the earth's surface through which lava,hot gases and rock fragments erupt.Such an opening forms when melted rock from deep within the earth blasts through the surface.Most valcanos are mountains,particularly cone-shaped ones,which were built up around the opening by lava and other materials thrown out during eruptions.
In some eruptions,huge fiery clouds rise over the mountain,and glowing rivers of lava flow down its sides.
In some other eruptions,red-hot ash and cinders shoot out the mountaintop,and large chunks of hot rock are blasted high into the air.A few eruptions are so violent they blow the mountain apart.
Some other eruptions occur on volcanic islands.Such islands are the tops of volcanic mountains that have been built up from the ocean floor by repeated eruptions.Other eruptions occur along narrow cracks in the ocean floor.In such eruptions,lava flows away from the cracks,building up the sea bottom.

Answer 2

volcano (vŏl-kā'nō) Pronunciation Key An opening in the Earth's crust from which lava, ash, and hot gases flow or are ejected during an eruption. A usually cone-shaped mountain formed by the materials issuing from such an opening. Volcanoes are usually associated with plate boundaries but can also occur within the interior areas of a tectonic plate. Their shape is directly related to the type of magma that flows from them—the more viscous the magma, the steeper the sides of the volcano. ◇ A volcano composed of gently sloping sheets of basaltic lava from successive volcanic eruptions is called a shield volcano. The lava flows associated with shield volcanos, such as Mauna Loa, on Hawaii, are very fluid. ◇ A volcano composed of steep, alternating layers of lava and pyroclastic materials, including ash, is called a stratovolcano. Stratovolcanos are associated with relatively viscous lava and with explosive eruptions. They are the most common form of large continental volcanos. Mount Vesuvius, Mount Fuji, and Mount St. Helens are stratovolcanos. Also called composite volcano.

Answer 3

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RE:
what does volcano mean?
Im doing a report in school about volcanos and i dont know what it means.

Answer 4

1. a vent in the earth's crust through which lava, steam, ashes, etc., are expelled, either continuously or at irregular intervals.
2. a mountain or hill, usually having a cuplike crater at the summit, formed around such a vent from the ash and lava expelled through it.

Answer 5

The term volcanology is derived from the Latin word vulcan, the Roman god of fire. Volcanology is a branch of geology.

Answer 6

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