what is an active volcano definition
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- (plural active volcanos or active volcanoes). ( 1 geology) A volcano that has erupted in the last 10,000 years, not necessarily venting lava or gases now. 2  Link/Cite.
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Volcano Facts and Types of Volcanoes A volcano is a vent or fissure in Earth's crust through which lava, ash, rock and gases erupt. A volcano is also a mountain formed by the accumulation of these eruptive products. Let's take a look at how volcanoes form:
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- Definition of VOLCANO for Kids. 1. : an opening in the earth's crust from which hot or melted rock and steam erupt. 2. : a hill or mountain composed of material thrown out in a volcanic eruption.
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Process A volcano is an opening, or eruption in Earth's surface, or also known as tectonic plates. tectonic plates are what makes up the crust of the Earth and volcanos are usually found where tectonic plates are converging or diverging.This reaction causes hot magma, volcanic ashes and gases to escape from beneath the Earth, and is what we know as a volcano eruption.ectonic plates are what makes up the crust of the Earth and volcanos are usually found where tectonic plates are converging or diverging. This reaction causes hot magma, volcanic ashes and gases to escape from beneath the Earth, and is what we know as a volcano eruption.
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- Volcano. A volcano is a fissure or vent through which molten rock material, or magma, and gases from the interior of the earth erupt on to its surface, and the landform, which is produced as a result of this eruption.EOLOGY VOLCANISM ICELAND. . Buses-Flights Ferries-Car rentals. The processes by which molten rock material, or magma, rises from the interior of the earth on to or towards its surface, and by which associated gases are released into the atmosphere are called Volcanism.
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- Confidence votes 48. A volcano is an opening, or rupture, in a planet's surface or crust, which allows hot, molten rock, ash, and gases to escape from below the surface. Volcanic activity involving the extrusion of rock tends to form mountains or features like mountains over a period of time. mid-oceanic ridge, for example the Mid-Atlantic Ridge, has examples of volcanoes caused by divergent tectonic plates pulling apart; the Pacific Ring of Fire has examples of volcanoes caused by convergent tectonic plates coming together.
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Volcano A volcano is a rupture on the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.
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What is a Volcano? A volcano is an opening in the Earth's crust where magma from the mantle reaches the surface, sometimes in a slow, dribbling fashion, called an effusive eruption, and sometimes in a violent event called an explosive eruption.asaltic lava has low silica content. This type of less viscous lava flows from the volcanoes in Hawaii. Rhyolite on the other hand is an igneous rock with a high silica content formed from more viscous lava flows. Basaltic flows are characterized by the rivers of lava flowing down a mountain.
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Volcano, Hawaii Volcano, Hawaii. Volcano is a census-designated place (CDP) in Hawaii County, Hawaii, United States located in the District of Puna with a small portion of the CDP in the District of Kaʻū. The population was 2,575 at the 2010 census. Contents.
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Mount Unzen Volcano, vent in the crust of the Earth or another planet or satellite, from which issue eruptions of molten rock, hot rock fragments, and hot gases. A volcanic eruption is an awesome display of the Earth’s power.
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- A volcano is an opening in the Earth’s crust from which magma (hot molten rock), ash and gases escape. Volcanic eruptions are driven, in part, by pressure from dissolved gas, much as escaping gases force the cork out of a bottle of champagne.When magma erupts, it is called lava. The type of volcano that forms depends on whether the lava is viscous (thick and sticky) or runny, and on how much gas it contains.If lava is runny, gases escape easily. A runny lava with lots of gas forms fire-fountains that spew into the air and break into globs that solidify as they fall to the ground.olcanic eruptions are driven, in part, by pressure from dissolved gas, much as escaping gases force the cork out of a bottle of champagne. When magma erupts, it is called lava. The type of volcano that forms depends on whether the lava is viscous (thick and sticky) or runny, and on how much gas it contains.
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What are Active Volcanoes? Geologists classify volcanoes into three distinct groups: dormant, extinct and active volcanoes. Dormant volcanoes haven’t erupted in a long time, but they could again; extinct volcanoes have erupted for thousands of years and might be dead. Active volcanoes, on the other hand, erupted recently, and they’re probably going to erupt again soon. Strombolian eruption. There are approximately 500 active volcanoes in the world today, not including those underneath the oceans. In fact, as you read these words, there are probably 20 volcanoes erupting right now.
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volcano Noun. 1. volcano-a fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt. vent. crack, scissure, cleft, crevice, fissure-a long narrow opening.eructation, extravasation, eruption - (of volcanos) pouring out fumes or lava (or a deposit so formed).. a. An opening in the earth's crust from which lava, ash, and hot gases flow or are ejected during an eruption. b. A similar opening on the surface of another celestial object. 2. A usually cone-shaped mountain formed from the materials issuing from such an opening.
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volcano 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, usu. having a cuplike crater at the summit, formed around such a vent from the ash and lava expelled through it.
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- A volcano may refer to. 1  a vent or opening in the surface of the Earth through which lava, hot gases, ash and rock fragments erupt OR. 2  the usually conical mountain formed by the deposition and accumulation of erupted material around the opening.
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volcano The definition of a volcano is a rupture in the Earth's crust where molten lava, hot ash, and gases from below the Earth’s crust escape into the air.he definition of a volcano is a rupture in the Earth's crust where molten lava, hot ash, and gases from below the Earth’s crust escape into the air.
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VENT Noun. 1. volcano-a fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt. vent. crack, scissure, cleft, crevice, fissure-a long narrow opening. eructation, extravasation, eruption - (of volcanos) pouring out fumes or lava (or a deposit so formed).
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volcano 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.
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Atom An opening in the earth's crust from which lava, ash, and hot gases flow or are ejected during an eruption. b. A similar opening on the surface of another celestial object. 2. A usually cone-shaped mountain formed from the materials issuing from such an opening.oun. 1. volcano-a fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt. vent. crack, scissure, cleft, crevice, fissure-a long narrow opening.
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volcano 1. An opening in the Earth's crust from which lava, ash, and hot gases flow or are thrown out during an eruption. 2. A usually cone-shaped mountain formed by the materials that flowed or were thrown out from such an opening.
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Volcanic eruptions and environment On locations where tectonic plates diverge or converge, volcanoes can be found. A volcano consists of a deep magma chamber where magma accumulates, pipes that lead to surface vents, and the vents through which lava is emitted during a volcanic eruption.igure 1: layout of a volcano. Volcanoes that have not erupted for some time are dormant, and volcanoes that have not erupted even in the distant past are called extinct. Volcanic activity and volcanic eruption is usually triggered by alterations of tectonic plates, resulting in landslides or earthquakes.
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Atom Definition of VOLCANO for Kids. 1. : an opening in the earth's crust from which hot or melted rock and steam erupt. 2. : a hill or mountain composed of material thrown out in a volcanic eruption.ull Definition of VOLCANO. 1. : a vent in the crust of the earth or another planet or a moon from which usually molten or hot rock and steam issue; also: a hill or mountain composed wholly or in part of the ejected material. 2. : something of explosively violent potential. See volcano defined for English-language learners.
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How do volcanoes create islands? A volcano is an opening, or rupture, in a planet's surface or crust, which allows hot, molten rock, ash, and gases to escape from below the surface. Volcanic activity involving the extrusion of rock tends to form mountains or features like mountains over a period of time. volcano is an opening, or rupture, in a planet's surface or crust, which allows hot, molten rock, ash, and gases to escape from below the surface. Volcanic activity involving the extrusion of rock tends to form mountains or features like mountains over a period of time.
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What is a Volcano? Facts & Information - Geography for Kids | Educational Videos by Mocomi To understand the activity of volcanoes, you need to first understand the structure of the Earth. A volcano is a mountain from where the molten rocks or magma erupt through the surface. In simple terms, a volcano is an opening in the earth’s surface from which the molten rocks and gases escape out.
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Volcanoes A volcano is an opening in the earth's crust that allows molten rock from the mantle to flow out onto the surface as lava. Volcanoes also emit vast amounts of gas, primarily carbon dioxide, water vapor and sulfur dioxide.s the subducting plate plunges into the mantle, it becomes heated. When it reaches the asthenosphere or thereabouts, subducted water in the descending slab of crust lowers the melting temperature of the rock and a molten rock mixture forms. This hot, buoyant magma forces its way upward through the overriding crust.
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Volcano Volcanoes are closely associated with plate tectonic activity. Most volcanoes, such as those of Japan and Iceland, occur on the margins of the enormous solid rocky plates that make up the Earth’s surface. Other volcanoes, such as those of the Hawaiian Islands, occur in the middle of a plate, providing important evidence as to the direction and rate of plate motion.