does anybody know anything about volcanoes and what the lava is made of? This includes all three.?
413322
Wikipedia has an excellent explanation of each type of lava.
1183258
I have got some sites for science projects on volcanoes.\n\nhttp://www.all-science-fair-projects.com/project815_39.html\n\nThis is another project for making a volcano with a purchased kit.\n\nhttp://www.hobbytron.com/make-volcano-model-science-project-experiment.html\n\nThis is another volcano science project.\n\nhttp://www.scienceproject.com/projects/intro/primary/PX001.asp
55066
Volcanoes are one of the main ways that igneous rocks are deposited on the surface of the earth. Other igneous rocks form by cooling of magma within the earth and do not reach the surface. These are called intrusive igneous rocks. \n\nOne of the models to explain how our atmosphere was created suggests that volcanic activity released both water vapor and other gases. The present day atmosphere has changed its composition from the original because of the plants that have released oxygen from carbon dioxide.  Current estimates are that volcanic gases contribute 110 million tons of carbon dioxide per year while man's contribution is about 10 billion tons a year. \n\nVolcanoes also contribute other gases and airborne particulates to the atmosphere that can have adverse affects on the environment for several years after a major eruption. Sulphur dioxide is present in most volcanic eruptions and this changes to acid rain as it is dissolved in the atmosphere. This is very harmful to plant life and damages healthy soil. Volcanic ash is often ejected high into the atmosphere and remains there for many years before settling back to earth. This has been speculated to have been the cause of global periods of colder weather  that occured in the 400's and in prior times. \n\nThe formation of intrusive igneous rocks also involves this outgassing of carbon dioxide and other gases, but because it takes place very slowly and often deep underground it has a very gradual effect on the atmosphere. Much of the gas that comes from these rocks will stay traped by being dissolved in water that remains in the subsurface. The movement of this water actually is responsible for many mineral deposits of things like copper ore.
251860
Magma is the molten rock when it is under the surface.  It becomes lava when it reaches the surface.\n\nThe tremendous pressures in the Earth's mantle heat rock and liquify it.
247629
There are approximately 1500 active volcanoes in the world. About 150 of them are located all along the ring of fire.\n\n:)
790652
Parts of a volcano are:  Country Rock, magna reservoir, conduit, flank, base, lava, sill, dike, ash, throat, summit, parasitic cord,crater, ash cloud and vent.
867639
See for yourself:\n\nhttp://www.solcomhouse.com/volcano.htm\nhttp://volcano.und.edu/vwdocs/frequent_questions/group10_new.html\nhttp://www.exn.ca/volcanoes/causes.cfm\nhttp://vulcan.wr.usgs.gov/Outreach/AboutVolcanoes/where_do_volcanoes_occur.html\nhttp://library.thinkquest.org/10136/volcano/volctq.htm\nhttp://en.wikipedia.org/wiki/Volcano\n\nMore random links I keep at hand for God knows what uses.
536076
You need to include:\n1. A world map of volcanoes. \n2. Statistics about volcanoes (average number of people died from them, how frequently they erupt and destroy things).\n3. Glossy color pictures of volcanoes.\n4. A scientific basis, such as \n.....a question "why do volcanoes occur?"\n.....specific hypotheses as explanations of natural phenomena (a short guess about why volcanoes erupt before the kid does any research, such as "I thought volcanoes erupted because it was like a big pimple. I wasn't sure, so I decided to research this topic.")\n.....research about why (check the Internet, encyclopedia or library)\n.....a conclusion "volcanoes happen because ..."\n.....and "my hypothesis was wrong. I found that volcanoes are not like pimples. They are more like open arteries, because once they erupt they keep spewing until they go dry."\n5. All the good volcano projects have videos of live volcanoes (use an LCD monitor).
1087407
There are and were other planets/moons that have volcanic activity.\n\nMars\nMars has the remnants of the largest volcano mountain.  The volcano would be the size of Arizona.  It is not active at the moment.  See the first link below for more information.\n\nIo - Moon\nThe recent Galileo trip to Jupiter revealed that its moon Io is very geologically active.  In its flyby back in 2000 it detected 10 new volcanoes.  81 volcanoes have been observed on Io.  See the second link for the CNN story.\n\nNevertheless, there are some other geologically active objects in our solar system.  There are certainly other objects that are active in the universe.
412918
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
532046
woohoo geology... lets see if I remember anything...\n\nOkay here is a basic thing, the composition of rocks, especially it's silicate level, can tell us much about the molten/semimolten layers of Earth.... Okay I was enver very good in this subject, so look here...\nhttp://en.wikipedia.org/wiki/Geology
248396
OMGGG!! I can go on forever on this one... but I'll try to be as brief as possible. \n\nOk, so rocks are made by three different processes: \n\n- Volcanic eruptions - These rocks are called IGNEOUS ROCKS.  There are various types of rocks that can be produced.  They can be from either when lava flows on the surface of the earth and cools down, or when magma inside a volcano cools down before it hits the surface.  It doesn't take all that long for these types of rocks to form, and hese rocks are usually crystallized and can be easily distinguished because of the crystal type of formation.\n\n- Another tyoe of rocks - called SEDIMENTARY ROCKS are a result of erosion by wind, water, or glaciers.  These types of rocks may take thousands or even millions of years to form.  So, in this process, sediment (the tiny particles) that is eroded away from the different erosion processes settle in one place and over a long period of time they are formed into rocks. One layeer after the next. \n\n- And the last types of rocks are formed from either Igneous rocks or Sedimentary rocks.  These are called METAMORPHIC ROCKS... word derived because thise rocks have "morphed" into something that is no longer sedimentary or igneous rocks.  These rocks go through these changes and become Metamorphic due to the high pressure which causes heat to build up in these solids.  These rocks can also be relatively easily distinguished because when you look at them, you can actually see flat grains.\n\nso, no! Rocks do not magically appear but they appear over time.  \n\nThere is tons more to the subject, as in you can actually study a given rock and tell how old it actually is and when it was originally formed, but that's another question! :)\n\nhope this helped... \nCheers!
651917
A volcano is a geological landform usually generated by the eruption through a planet's surface of magma, molten rock welling up from the planet's interior. Other forms of volcano include ice volcanoes (particularly on some moons of Jupiter, Saturn and Neptune) and mud volcanoes. On Earth, volcanoes tend to occur near the boundaries of crustal plates. There are Diff types of volcanoes:\n1)Extinct--lowest possible chance of erupting.Whether a volcano is truly extinct is often difficult to determine. Since "supervolcano" calderas can have eruptive lifespans sometimes measured in millions of years, a caldera that has not produced an eruption in tens of thousands of years is likely to be considered dormant instead of extinct.\n\n2)Dormant --those that are not currently active but could become restless or erupt again. Confusion however, can arise because many volcanoes which scientists consider to be active are referred to as dormant by laypersons or in the media.\n3)Active--it is currently erupting or showing signs of unrest, such as unusual earthquake activity or significant new gas emissions. Many scientists also consider a volcano active if it has erupted in historic time.\n  \nIt is important to note that the span of recorded history differs from region to region; in the Mediterranean, recorded history reaches back more than 3,000 years but in the Pacific Northwest of the United States, it reaches back less than 300 years, and in Hawaii, little more than 200 years. The Smithsonian Global Volcanism Program's definition of 'active' is having erupted within the last 10,000 years.So A volcano may occur anytime as earthquakes do.
765041
The two properties of the magma that determine the kind of volcano are:\n\n1)Viscosity\n2)Composition\n\nThe viscosity of the magma is a function of the temperature, the degree of crystallization, degree of polymerization and the composition of the melt.\n\nThe composition of the melt is related to the amount of silica it contains and the amount of volatiles dissolved.\n\n\nThis two property are usually coupled (they act together).\nSilica rich magmas are usually colder that mafic ones, contain more volatiles, and hence they have a higher viscosity compared to mafic magmas, so they form strato volcanoes as opposed to shield volcanoes.
1156287
it's the core of the earth. lava. melted rock.etc
20175
Geologists classify volcanoes in following ways:\n\nCinder cones are the simplest type of volcano. They are built from particles and blobs of congealed lava ejected from a single vent. As the gas-charged lava is blown violently into the air, it breaks into small fragments that solidify and fall as cinders around the vent to form a circular or oval cone. Most cinder cones have a bowl-shaped crater at the summit and rarely rise more than a thousand feet or so above their surroundings. Cinder cones are numerous in western North America as well as throughout other volcanic terrains of the world.\n\nSome of the Earth's grandest mountains are composite volcanoes--sometimes called stratovolcanoes. They are typically steep-sided, symmetrical cones of large dimension built of alternating layers of lava flows, volcanic ash, cinders, blocks, and bombs and may rise as much as 8,000 feet above their bases. Some of the most conspicuous and beautiful mountains in the world are composite volcanoes, including Mount Fuji in Japan, Mount Cotopaxi in Ecuador, Mount Shasta in California, Mount Hood in Oregon, and Mount St. Helens and Mount Rainier in Washington.\n\nShield volcanoes, the third type of volcano, are built almost entirely of fluid lava flows. Flow after flow pours out in all directions from a central summit vent, or group of vents, building a broad, gently sloping cone of flat, domical shape, with a profile much like that of a warrior's shield. They are built up slowly by the accretion of thousands of highly fluid lava flows called basalt lava that spread widely over great distances, and then cool as thin, gently dipping sheets. Lavas also commonly erupt from vents along fractures (rift zones) that develop on the flanks of the cone. Some of the largest volcanoes in the world are shield volcanoes. In northern California and Oregon, many shield volcanoes have diameters of 3 or 4 miles and heights of 1,500 to 2,000 feet. The Hawaiian Islands are composed of linear chains of these volcanoes including Kilauea and Mauna Loa on the island of Hawaii-- two of the world's most active volcanoes.\n\nVolcanic or lava domes are formed by relatively small, bulbous masses of lava too viscous to flow any great distance; consequently, on extrusion, the lava piles over and around its vent. A dome grows largely by expansion from within. As it grows its outer surface cools and hardens, then shatters, spilling loose fragments down its sides. Some domes form craggy knobs or spines over the volcanic vent, whereas others form short, steep-sided lava flows known as "coulees." Volcanic domes commonly occur within the craters or on the flanks of large composite volcanoes. The nearly circular Novarupta Dome that formed during the 1912 eruption of Katmai Volcano, Alaska, measures 800 feet across and 200 feet high.
950107
Ah... something called a caldera forms.\n\nhttp://vulcan.wr.usgs.gov/Glossary/Caldera/description_caldera.html\nhttp://en.wikipedia.org/wiki/Caldera\nhttp://www.agu.org/pubs/crossref/2003/2003GL018380.shtml\nhttp://hvo.wr.usgs.gov/volcanowatch/1996/96_04_26.html\nhttp://www.yellowstonenationalpark.com/calderas.htm\nhttp://www.mvo.ms/glossary.htm\n\nGosh, if these don't help... I don't know what will.