what are volcanos made of?
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In a phrase, volcanic rock.\n\nEach volcano erupts constructively and destructively, and some of those constructive eruptions build the sides of the volcano.  The type of magma determines the color and shape.
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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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Baking soda, vinegar, orange food coloring... Volcano!\n\nDon't do the whole volcano, just do half of one. Basically, you do a cross section of it. Put a tube down the middle of it. The front part of your project will basically look like a volcano, but the part in the back will be a cross section that shows the different levels of rock inside a volcano, and how pressure builds up inside.\n\nResearch what happens during an eruption, and famous places that volcanos have erupted.
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Igneous rocks are formed when molten rock (magma) cools and solidifies, with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks. This magma can be derived from either the Earth's mantle or pre-existing rocks made molten by extreme temperature and pressure changes. Over 700 types of igneous rocks have been described, most of them formed beneath the surface of the Earth's crust. The word "igneous" is derived from the Latin ignis, meaning "fire".
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Mt. St. Helens was formed from the subduction of the Juan de Fuca Plate underneath the North American Plate.  Subsequent eruptions, producing basalt and andesitic lava flows, have either reshaped or built up the volcano over time.
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I found a different website that talks about all the different types of volcanos.  There  are Shield volcanoes, Strato, Rhyolite caldera, Monogenetic fields, Flood basalts and Mid-ocean ridges.  There was also some interesting volcano facts that you might be able to use at the 2nd website below.
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Different kinds of volcanos.. Shield, cone etc.\nJust the way the lavva flows out and the ash spits up./
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start from here:http://en.wikipedia.org/wiki/Volcano\nthan click here:\nhttp://rds.yahoo.com/_ylt=A0geupc15FRFTXQBUXpXNyoA;_ylu=X3oDMTE2ZGhvZmh2BGNvbG8DZQRsA1dTMQRwb3MDMQRzZWMDc3IEdnRpZANERlg1XzMw/SIG=19tfhms70/EXP=1163277749/**http%3a//rdre1.yahoo.com/click%3fu=http%3a//www.volcanolive.com/%26y=04D6D45EA8332C5A9E%26i=680%26c=21908%26q=02%255ESSHPM%255BL7sviz%253Fips%257C%7eqpzl6%26e=utf-8%26r=0%26d=wow%7eDFX5-en-us%26n=0IHKK1KQNHA4BU6E%26s=12%26t=%26m=4554E436%26o=01C888B21CE6710E36%26x=052DFE91D28B9E0A83349375261B2BB2A1\nhttp://rds.yahoo.com/_ylt=A0geupc15FRFTXQBXHpXNyoA;_ylu=X3oDMTE2aXBvZDkwBGNvbG8DZQRsA1dTMQRwb3MDMwRzZWMDc3IEdnRpZANERlg1XzMw/SIG=12fj2lehe/EXP=1163277749/**http%3a//www.geo.mtu.edu/volcanoes/west.indies/soufriere/govt\nhttp://rds.yahoo.com/_ylt=A0geupc15FRFTXQBaXpXNyoA;_ylu=X3oDMTE2bTQybGs2BGNvbG8DZQRsA1dTMQRwb3MDNQRzZWMDc3IEdnRpZANERlg1XzMw/SIG=13154364e/EXP=1163277749/**http%3a//interactive2.usgs.gov/learningweb/explorer/topic_hazards_volcanoes.asp\nhttp://rds.yahoo.com/_ylt=A0geupc15FRFTXQBV3pXNyoA;_ylu=X3oDMTE2MWFla2V2BGNvbG8DZQRsA1dTMQRwb3MDMgRzZWMDc3IEdnRpZANERlg1XzMw/SIG=1aaavi8gn/EXP=1163277749/**http%3a//rdre1.yahoo.com/click%3fu=http%3a//www.volcanolive.com/contents.html%26y=04BF5322B24FA45313%26i=680%26c=15685%26q=02%255ESSHPM%255BL7sviz%253Fips%257C%7eqpzl6%26e=utf-8%26r=1%26d=wow%7eDFX5-en-us%26n=0IHKK1KQNHA4BU6E%26s=12%26t=%26m=4554E436%26o=018610364A2BA0082E%26x=05679277237FEB7DFC07236F0AED3006C9
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They primarily occur in shield volcanoes & volcanic fissures.\n\nThe most notorious of these are found in Hawaii.\n\nBasaltic lava is made up of mostly of darker minerals such as magnesium & iron. It usually is lower in gas content & is less viscous than andesitic or felsic magmas.\n\nTwo major types of basaltic lava exist: Pahoehoe & A'a.\n\nPahoehoe is ropy & runny in nature while A'a is more brick-like. The names sound appropriate, don't they?\n\nThe type/shape/size of a volcano is determined by the kind of lava that extrudes from it. So basaltic lava is associated w/ shield volcanoes.\n\nShield volcanoes located w/in the U.S. include Cascade range in Oregon & Hawaiian volcanoes.\n\nHope this helps.\n\n:)
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There is a website on how to make a volcano model below
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1.  Volcanic rock consisting of large fragments fused together\n2.  A collection of objects laid on top of each other
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All fragments thrown into the air by a volcanic eruption are called pyroclastics. During a more violent eruption, the force of the blast sends superhot gas and millions of pieces of lava into the air. These particles are classified as bombs, cinders, or ash, depending on their size and shape. Small pieces of lava, which solidify almost immediately, form slivers of volcanic glass.\nTogether with rocks blown from the sides of a volcano, the entire collection of ejected material becomes a hot, fast-moving cloud of rock and ash. These flows can travel at great speed down the flanks of a volcano and into surrounding areas, causing extensive destruction. In 1902 the eruption of Mount Pelée, on the island of Martinique, created this type of pyroclastic blast and destroyed the town of Saint-Pierre, killing about 30,000 people.\n\nLike lava, pyroclastic material raining down on a volcano eventually compacts into solid layers that build up the volcano’s bulk. Some eruptions actually reduce the height of a volcano, because they are so powerful that they literally blow the top of the volcano off. In 1883 the cataclysmic explosion of Krakatau in Indonesia destroyed most of the island, which had been formed by the volcano.\n\n\nKrakatau 1883\nDestroyed entire island\nPumice Rafts (lava with lots of vesicles) trapped sailors for three days\nCaused Tsunami\nHeard as far as Australia
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Depends on the composition of the magma.\n\nMagma high in silica tends to be thick & gas bubbles are trapped. The gas builds up & boom! Explosion.\n\nBasaltic lava tends to be "soupy" so that the gas bubbles escape. No explosions here.\n\n:)
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types of volcanoes:\n1. shield\n2. composite/strato\n3. caldera\n4. MORB\n \ntypes of eruptions\n1. Strombolian\n2. Vulcanian \n3. Vesuvian\n4. Pelean\n5. Hawaiian\n6. Hawaian\n7. Icelandic\n8. plinian
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A supervolcano refers to a volcano that produces the largest and most voluminous kinds of eruption on Earth. The actual explosivity of these eruptions varies, but the sheer volume of extruded magma is enough to radically alter the landscape and severely impact global climate for years, with a cataclysmic effect on life.
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Pyroclastic flow is a superheated cloud of volcanic debris & gases.\n\nPyroclastic flow can involve any of the following volcanic materials...\n\nAsh & Dust - small material that usually ejected into the air during an eruption; can stay suspended for weeks in the atmosphere.\n\nCinders - pea-sized material ejected from volcano; not molten\n\nBlocks - about the size of your palm; ejected out of a volcano and into the air. They are not molten.\n\nBombs - partially molten material ejected through the air during an eruption.\n\nGases - gases released by volcanoes include water vapor, carbon dioxide, nitrogen, sulfer, etc.\n\nPyroclastic flow generally follows all the rules of gravity. It flows downhill. So during an eruption all this material is channeled down into the valleys below the erupting volcano.\n\nThe dangers accompanying pyroclastic flow are suffocation from gases released w/ the flow, being buried beneath the flow as it moves rather swiftly at about 300 mph, and the heat of the material itself which is roughly 1500 degrees Fahrenheit.\n\nAnything in the way of the flow will be annihilated. This may include whole forests, buildings, vehicles, and human beings.
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Like most of the interior of the earth, the movements and dynamics of magma are poorly understood. However, it is known that an eruption usually follows movement of magma upwards into the solid layer (the earth's crust) beneath a volcano and occupying a magma chamber. Eventually, magma in the chamber is forced upwards and flows out across the planet surface as lava, or the rising magma can heat water in the surrounding landform and cause explosive discharges of steam; either this or escaping gases from the magma can produce forceful ejections of rocks, cinders, volcanic glass, and/or volcanic ash also known as tephra. While always displaying powerful forces, eruptions can vary from effusive to extremely explosive.\n\nMost volcanoes on the land are formed at destructive plate margins: where oceanic crust is forced below the continental crust because oceanic crust is denser than continental crust. As the oceanic crust 'subducts', it is forced into a higher-temperature region called the asthenosphere, and melts. Friction between these moving plates may also be a cause of melting. The reduced density of the melting rock forces the newly formed magma to rise. As the magma rises through weak areas in the continental crust it may eventually erupt as one or more volcanoes. For example, Mount St. Helens is found inland from the margin between the oceanic Juan de Fuca Plate and the continental North American Plate. The oceanic crust is normally a highly-'mafic' (iron and magnesium rich) rock, but as it rises through granitic (more silicic) continental plates, it may cause 'partial melting' of both mantle rocks and the plate rocks, producing magmas of varying silicity. Volcanic arcs forming near subduction zones, on the edges of continental plates, usually form high-silicity (high-viscosity) stratovolcanoes. Examples include the South American Andes and the Cascade range.\n \nA volcano generally presents itself to the imagination as a mountain sending forth from its summit great clouds of smoke with vast sheets of flame. The truth is that a volcano seldom emits either smoke or flame, although various combinations of hydrogen, carbon, oxygen, and sulfur do sometimes ignite. What is mistaken for smoke consists of vast volumes of fine dust (called volcanic ash), mingled with steam and other vapors, chiefly sulfurous. Most of what appears to be flames is the glare from the erupting materials, glowing because of their high temperature; this glare reflects off the clouds of dust and steam, resembling fire.\n\nPerhaps the most conspicuous part of a volcano is the crater, a basin of a roughly circular shape, formed by a vent (or vents) from which magma erupts as gases, lava, and ejecta. A crater can be of large dimensions, and sometimes of vast depth. Very large features of this sort are termed calderas. Some volcanoes consist of a crater alone, with scarcely any mountain at all; but in the majority of cases the crater is situated on top of a mountain (the volcano), which can tower to an enormous height. Volcanoes that terminate in a principal crater are usually of a conical form.\n\nVolcanic cones are usually smaller features composed of loose ash and cinder, with occasional masses of stone which have been tossed violently into the air by the eruptive forces (and are thus called ejecta). Within the crater of a volcano there may be numerous cones from which vapours are continually issuing, with occasional volleys of ashes and stones. In some volcanoes these cones form lower down the mountain, along rift zones or fractures. When the cone is eroded these rifts or lava filled fractures remain as radial near vertical dikes of volcanic rock. For example the radiating dikes at Shiprock in NW New Mexico.