what does magma's viscosity depend on?
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What factors determine the viscosity of magma? The viscosity of magma depends upon its silica content and its what? The viscosity is also dependent on temperature. Higher Temperature results in lower viscosities typically, i.e more runny.
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Magmas, Igneous Rocks, Volcanoes and Plutons Viscosity is the resistance to flow (opposite of fluidity). Viscosity depends on primarily on the composition of the magma, and temperature. Higher SiO2 (silica) content magmas have higher viscosity than lower SiO2 content magmas (viscosity increases with increasing SiO2 concentration in the magma). Lower temperature magmas have higher viscosity than higher temperature magmas (viscosity decreases with increasing temperature of the magma).
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- Most magma that reaches the surface in volcanic eruptions comes from a part of Earth's mantle called the asthenosphere. The asthenosphere is a layer of solid rock that is near its melting point. Turning this solid rock into liquid magma means changing its temperature, pressure, and water content.Try your hand at melting rock to create magma. The first thing to try changing is the temperature.Your rock is a toasty 1,500 degrees Celsius, but it's still solid. Click on the words lower or raise to change the temperature your rock is subjected to inside Earth.ry your hand at melting rock to create magma. The first thing to try changing is the temperature. Your rock is a toasty 1,500 degrees Celsius, but it's still solid. Click on the words lower or raise to change the temperature your rock is subjected to inside Earth.
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- Gases in Magmas. At depth in the Earth nearly all magmas contain gas dissolved in the liquid, but the gas forms a separate vapor phase when pressure is decreased as magma rises toward the surface of the Earth. This is similar to carbonated beverages which are bottled at high pressure.
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- The three elements that determine viscosity in magma are:   Temperature  Silica  Oxides (gases)     Viscosity changes the way in which magma will flow. Magma with … low  viscosity will flow much more easily than high viscosity magma. 1 person found this useful.
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- 1 The minerals present in a rock and their relative proportions in the rock depend largely on the chemical composition of the magma. 2  This works well as a classification scheme if all of the minerals that could potentially crystallize from the magma have done so-usually the case for slowly cooled plutonic igneous rocks.
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Magmas, Igneous Rocks, Volcanoes and Plutons Non explosive eruptions are favored by low gas content and low viscosity magmas (basaltic to andesitic magmas). If the viscosity is low, non-explosive eruptions usually begin with fire fountains due to release of dissolved gases. When magma reaches the surface of the earth, it is called lava.Since it its a liquid, it flows downhill in response to gravity as a lava flows. Different magma types behave differently as lava flows, depending on their temperature, viscosity, and gas content.on explosive eruptions are favored by low gas content and low viscosity magmas (basaltic to andesitic magmas). If the viscosity is low, non-explosive eruptions usually begin with fire fountains due to release of dissolved gases. When magma reaches the surface of the earth, it is called lava.
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Geology Chapter 4 -Temperature of the magma -Dissolved gases in the magma (these factors actually control the viscosity of a given magma which in turn controls the nature of an eruption
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How Volcanoes Work Gas content varies depending on what sort of material melted to form the magma. As a general rule, the most explosive eruptions come from magmas that have high gas levels and high viscosity, while the most subdued eruptions come from magmas with low gas levels and low viscosity.
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What factors determine the viscosity of a magma? What kinds of landcapes are produced by volcanoes whose lavas The main factor is the temperature. The higher temperature the magma is, then the lower viscosity it will have (because it has more internal energy and is easier to move). Source(s): chem teacher. jcann17 · 9 years ago.
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What is Viscosity? Application, Flow, Factors Although gases, in general, flow much more easily than liquids, the viscosity of gases can vary too. The size and shape (or bulkiness) of gas particles and temperature are factors that affect the viscosity of gases as well as the viscosity of liquids.
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Netflix In other words, you first have to pay for an Unlimited Streaming (or Limited Streaming) account first, and then add to that cost an addition chunk of change per month for discs. The main reason to opt for a DVD-by-mail add-on is that it expands the Netflix catalog immensely. When you can't find a particular TV show or film to stream, you'll often find it among the DVDs. Prices for DVD plans start at $4.99 per month for one disc at a time for a maximum of two discs per month. (Postage is included in all prices.) To get unlimited DVDs per month, but only one disc at a time, you'll pay $7.99 on top of your other Netflix base price.
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Blood Function and Composition The viscosity of blood depends on factors such as shear rate, haemocrit, red cell deformability, plasma viscosity and red cell aggregation. Although there are many factors involved, hyperviscosity syndrome can be generated by a rise in only one factor. A state of hyperviscosity causes sluggish blood flow and reduced oxygen supply to the tissue.
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What three factors control the viscosity of a lava? The three elements that determine viscosity in magma are:   Temperature  Silica  Oxides (gases)     Viscosity changes the way in which magma will flow. Magma with … low  viscosity will flow much more easily than high viscosity magma.
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Portable appliance testing Portable appliance testing is abbreviated as PAT. The correct term for the whole process is In-service Inspection & Testing of Electrical Equipment (as defined by IET/IEE and City and Guilds). In Australia, the common name for PAT is simply 'Test and Tag'.The regulatory guidelines are set out in AS3760:2013.he correct term for the whole process is In-service Inspection & Testing of Electrical Equipment (as defined by IET/IEE and City and Guilds). In Australia, the common name for PAT is simply 'Test and Tag'. The regulatory guidelines are set out in AS3760:2013.
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Does the viscosity of magma depend on silica and temperature? Yes. Viscosity is the resistance of a fluid to flowing. A high viscosity means low flowing (I specifically mention this because this is a huge pitfall) When silica content i … ncreases, and when temperature decreases, the viscosity of a magma increases along with it. 2 people found this useful. Answered.
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Is viscosity a function of density only? For the most part, temperature is the dominant factor in viscosity, not density. Unless you are also considering multi-component fluids, in which case the components of the fluid are the biggest factor. At any rate, the typical rule of thumb is that for liquids, the viscosity decreases as temperature increases. For gases, the viscosity increases as temperature increases. This is true for both dynamic and kinematic viscosity. Most models for viscosity don't even factor in density.
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Evidence for Internal Earth Structure and Composition Seismic velocities depend on the material properties such as composition, mineral phase and packing structure, temperature, and pressure of the media through which seismic waves pass. Seismic waves travel more quickly through denser materials and therefore generally travel more quickly with depth.
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OBSIDIAN IS HOT STUFF Silica-rich magma squeezes into rock fractures to form layers and lenses of obsidian that are relatively free of dirt, ash and other impurities. Changes in magma composition and water content often occur during the eruption and subsurface emplacement of obsidian flows.
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Viscosity of Magmas The release of gas during eruption is particularly likely to be explosive if the magma is both viscous (as gas is released, so viscosity is immediately increased) and volatile rich. Some magmas have already begun to crystallise by the time they reach the surface.
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Chapter 9 Concepts Magma's composition, its temperature, and the amount of dissolved gases it contains. - affect the magma's viscosity: the more viscous the material, the greater its resistance to flow.
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- Since volcanic eruptions are caused by magma (a mixture of liquid rock, crystals, and dissolved gas) expelled onto the Earth's surface, we must first discuss the characteristics of magma and how magmas form in the Earth.Characteristics of Magma.Types of Magma.hen magma reaches the surface of the earth, it is called lava. Since it its a liquid, it flows downhill in response to gravity as a lava flows. Different magma types behave differently as lava flows, depending on their temperature, viscosity, and gas content.
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Viscosity of Magmas Low-silica magmas are typically formed by partial melting of mantle rocks beneath mid-ccean ridges or at “hot spots” like Hawaii. These magmas erupt as basalts or intrude as gabbro, and are far less viscous.
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- Explain that viscosity of lava and magma will vary depending on the temperature and the composition. Explain that the parent material of the magma that forms shield volcanoes is generally basalt, while the parent material of the magma forming composite volcanoes is generally rhyolite (or andesite).6. Write on the board that rhyolite has 69% or more silica, while basalt has about 45-54% silica. Ola Ka Honua: Volcanoes Alive 293 ©2001, 2007 UAF Geophysical Institute Teacher Instructions Volcano Models7. Using plates B and C, show how “magma” of different viscosities creates different types of volcanoes:a. Poke the mustard bottle through the hole in plate B and squeeze. A large mound should form, representing a composite volcano.b.
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- Non-ideality may manifest itself in a number of different ways, e.g., the viscosity of a liquid may depend on the rate and/or the time over which the shear force is applied, or the fluid may exhibit some elastic as well as viscous properties..
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CSET - Volcanoes and Other Igneous Activity 082914 Explain how convection currents could affect the depth at which molten rocks are found. Magma can form by decompression melting if the rock begins to rise and the pressure decreases. This causes the temperature at which melting occurs to decrease. If water is added, the temperature at which the rock melts decreases. A body of hotter rock may rise and trigger melting in the crust.
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- The low viscosity of the magma allows the lava to travel down slope on a gentle slope, but as it cools and its viscosity increases, its thickness builds up on the lower slopes giving a somewhat steeper lower slope. Most shield volcanoes have a roughly circular or oval shape in map view.