I need more information about volcanoes for a Science Project. Please put the information in your own words.?
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volcanoes are built when tectonic plates push together, the way mountains are formed. except volcanoes have magma inside of them. the gas and magma inside are under extreme pressure, and this pressure pushes its way through small cracks in the rock, eventually escaping in an eruption of gas that brings lava with it. a lot of people have been killed by eruptions, but i cant tell you how many. the lava takes weeks or months to cool down unless it hit the water, which will cool it in a matter of days.
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Currently there are over five thousand active volcanoes underwater varying from ones larger than any on the surface to cones no larger than an automobile. The net reslut of this action is thermal heating of the oceans, at key positions, which in turn reaches the surfaceto be carried aloft into the atmosphere to become part of our surface weather pattern system. As the oceans are heated winds of a high velocity are created and driven over the land areas due to temperature differential. \n\nIn the Pacific Ocean there are ocean basins - volcanoes, of which there are estimated to be about 20,000 on the ocean bottoms of the world. Some of these form single mountains, and others join with other volcanoes to form ridges. The highest ones rise above the surface of the water as islands, which in many cases linear groups such as the Hawaiian Islands. \n\nIsland groups are simply the highest summits of ridges. The submerged part of the Hawaiian Islands is among the largest and longest of these volcanic ridges--more than 1,500 miles (2,400 kilometers) long. \n\nMany island groups of the Pacific are linear in form, with the largest and highest island of the group at one end and the lowest and smallest at the other. This feature is true of the Hawaiian Islands, explained as the result of intermittent movement of the tectonic plate over what is called a hot spot. \n\nMolten volcanic material is ejected from it and results in the formation of a large mass of material if the plate pauses for a sufficient length of time at the spot. In this way a volcanic island, or ridge, is built. The plate moves, and another part of it lies over the hot spot, receiving fresh volcanic material. Meanwhile the older material, if it has become an island, is subject to erosion and thus is worn down.
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Volcanoes occur in hotspots where the earths crust is thin, most often around subduction zones, or areas where the tectonic plates are colliding and one plate is sliding under the other. There are other places where volcanos or hotspots occur, such as Hawaii, but in that case the chain of islands known as Hawaii are being pushed north by the movement of the tectonic plate there. In fact right now there is another island being built beneath the ocean just south of the main island. The earth is slowly cooling though events such as these. Beneath the crust the magma is under intense pressure and it has to escape somewhere, so it does escape at these weak places in the earths crust which we call volcanos.\n\nOf course I could have just plagarized my answer like  mikah_nine, but instead I opted to answer from my own knowledge and even include a source.
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Check out all the links I listed, you should enjoy...\n\nA volcano is an opening (or rupture) in the Earth's surface or crust, which allows hot, usually molten rock, ash, and gases to escape from deep below the surface. Volcanic activity involving the extrusion of rock tends to form mountains or features like mountains over a period of time.\n\nVolcanoes are generally found where two to three tectonic plates pull apart or are coming together. A mid-oceanic ridge, like 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. By contrast, volcanoes are usually not created where two tectonic plates slide past one another (like the San Andreas fault). Volcanoes can also form where there is stretching of the Earth's crust and where the crust grows thin (called "non-hotspot intraplate volcanism"), such as in the African Rift Valley or the European Rhine Graben with its Eifel volcanoes).\n\nFinally, volcanoes can be caused by "mantle plumes," so-called "hotspots;" these hotspots can occur far from plate boundaries, such as the Hawaiian Islands. Interestingly, hotspot volcanoes are also found elsewhere in the solar system, especially on rocky planets and moons.
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Mt. St. Helens is a subduction volcano.\n\nVolcanism in subduction is caused by volitals, like H2O, CO2. These are carried down by the oceanic plate, mainly in the form of weak minerals. These minerals break down with pressure and temperature into stronger minerals that don't contain water and carbon dioxide. The leftover gases and liquids travel into the mantle (the mantle wedge) and hydrate the mantle, causing melting. The melt rises and then... volcano!
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Scientists excavating at the site of the world's biggest recorded volcanic eruption on an Indonesian island have found human remains and artifacts in an area they said may be the ``Pompeii of the east.''\n\nThe discoveries were made near Tambora, on Sumbawa Island, which erupted in 1815. The volcano produced 150 cubic kilometers of ash that fell as far as 1,300 kilometers (800 miles) away. Tambora lies about 1,300 kilometers to the east of Indonesia's capital, Jakarta.\n\n``There is a potential that Tambora could be the Pompeii of the east and it could be of great cultural interest,'' Haraldur Sigurdsson of the University of Rhode Island, who led the excavation, said in a statement published on the university's Web site. ``All the people, their houses and culture are still encapsulated there as they were in 1815.''\n\nThe archeological dig led to the discovery of two human bodies, ceramic pots and artifacts linking Tamboran culture to that of Vietnam and Cambodia. The eruption of Mount Vesuvius in Italy in 79 AD covered the cities of Pompeii and Herculaneum in layers of ash. Pompeii was discovered in 1748 with buildings and artifacts intact. The discovery gave insight to historians about ancient Roman life.\n\n``If it's true that they found such remains, it will reveal the culture at that time,'' said Atje Purbawinata, head of volcano monitoring and research at the Volcanological Survey of Indonesia. ``A generation of local people might have been lost due to the eruption. Now it could be revealed what happened.'' \n\nThe expedition involved teams from the University of Rhode Island and the University of North Carolina, the statement said. They spent six weeks in the island in 2004.\n\nStill, the team didn't seek permission from the Indonesian Institute of Science, said Neni Sintawardani, department head in charge of issuing research clearance at the agency.\n\nIgan Sutawidjaya, a senior researcher at the Volcanological Survey of Indonesia, a member of the team to Tambora, said they obtained permission from Indonesia's immigration department and the foreign ministry. He didn't know if the science agency needed to approve the trip.\n\n``In granting a clearance, we always require them to cooperate with a qualified Indonesian so we can share knowledge,'' Sintawardani said.\n\nSome Indonesian archeologists said the evidence of Khmer culture among the ruins could have been because of trade.\n\n``The ceramic pots and other household materials found might be goods that the people of Tambora traded overseas, the Mon- Khmer culture has actually never been found across Indonesia,'' said Bagyo Prasetyo, an archeologist with the Center of Archeological Research in Jakarta. ``We also need to know if the team did carbon dating.''\n\nVolcanic Explosivity Index\n\nTambora's eruption was rated 7 according to the Volcanic Explosivity Index, which measures the height of the eruption and the amount of ash ejected, according to the Volcano World Web site hosted at the University of North Dakota, making it the biggest recorded eruption. Mount Toba in Sumatra Island, which erupted 76,000 years ago, had a Volcanic Explosivity Index of 8.\n\nTambora's eruption killed about 10,000 people because of the pyroclastic flows, while an estimated 82,000 died after the eruption because of disease and hunger. The year 1815 is also known as the ``year without a summer,'' because gases released by Tambora resulted in a global cooling and led to food shortages in Europe.\n\n``The findings were remarkable,'' said Sutawidjaya of the Volcanological Survey. A team from the agency will visit the area again in April to continue its research, he said.\n\nPumice, Ash\n\nThe Tambora discovery was made after cutting through a 10- foot thick deposit of pumice and ash, the statement said. The area may also have a wooden palace. Sigurdsson and his team plan to ret
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Yahoo search on images of volcanos:\nhttp://img.search.yahoo.com/search/images?fr=slv2-&ei=UTF-8&p=volcano
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Eruptions! Earthquakes!  The cool exciting stuff!  What did you want to know about it?
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http://www.volcano.si.edu/reports/usgs/index.cfm
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1.the molten mixture of rock-forming subtances, gases,and water deep in earths mantleis called magma .\n2.the ring of fire is a belt of volcanoes around the rim of the pacific ocean.\n3.the more Silica that the magma contains, the thicker the magma is.\n4.An eruption happens when an explosive erruption hurls ash,cinder,bombs,and gases out of a volcano. \n5.in a process called smeltin, an ore is melted to separate the use full metal from other elements from the ore.\n6.the property of density is the mass of the minral sample per unit volume.
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http://en.wikipedia.org/wiki/Top_10_most_deadly_Volcanic_Eruptions\n\nhttp://en.wikipedia.org/wiki/List_of_volcanoes
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There are approximately 1500 active volcanoes in the world. About 150 of them are located all along the ring of fire.\n\n:)
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A volcano is a geological landform (usually a mountain) where a substance, usually magma (rock of the Earth's interior made molten or liquid by extremely high temperatures along with a reduction in pressure and/or the introduction of water or other volatiles) erupts through the surface of a planet. Although there are numerous volcanoes (some very active) on the solar system's rocky planets and moons, on Earth at least, this phenomenon tends to occur near the boundaries of the continental plates. However, important exceptions exist in hotspot volcanoes.\n\n \nSmoking Bromo and Semeru volcanoes on Java in Indonesia.The name "volcano" originates from the name of Vulcan, a god of fire in Roman mythology. The study of volcanoes is called vulcanology (or volcanology in some spellings).\n\nMud volcanoes are formations which are often not associated with known magmatic activity. Active mud volcanoes tend to involve temperatures much lower than those of igneous volcanoes, except when a mud volcano is actually a vent of an igneous volcano. This article describes igneous volcanoes.\nhttp://en.wikipedia.org/wiki/Volcano\n\nTo learn more and see images click here\nhttp://volcano.und.edu/volcanoes.html
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in building a volcano...\nmaterials:\nvinegar\nbaking soda\npebbles\nfood color(orange as lava)\nprocedure:\nArrange the pebbles or stones in a volcano shape.make sure that there is a hole at the center.Fill the hole by means of putting the vinegar mixture(vinegar+food color)then add baking soda..The volcano will erupt....
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Volcano is the result of Lava and gases gushing out of the surface of the earth at great heat and pressure.  The molten lava is running over the land and destroy the plants and trees and after cooling becomes rock there. Fresh lava  comes out and run in the available slope.  The result is a mountain is growing with fire and lava.  Thus the mountains are the result of volcano and lava.  When the pressure within the volcano is reduced the volcano takes rest.It will erupt at any time  and send lava and gases, fire in all the directions.  The centre of the earth is believed to contain very hot lava and gases which is likely to come out at any time in any part; and most likely in the soft surfaces .
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by following this recipe:\nhttp://hometown.aol.com/ckckside/reports/volcanoes/vol10.htm
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Different kinds of volcanos.. Shield, cone etc.\nJust the way the lavva flows out and the ash spits up./