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.
http://www.geolsoc.org.uk/ks3/gsl/education/resources/rockcycle/page3655.html
The more SiO2 bonds the stronger the magma is, also meaning it is thicker. My Experiment is on the viscosity of magma and how you would measure it. Factors that could affect the viscosity of magma are Temperature and composition. Composition because magma contains a certain amount of water and temperature because this will tell me how runny the magma is at different temperatures.
http://www.markedbyteachers.com/gcse/science/investigation-into-the-factors-that-affect-the-viscosity-of-magma.html
Viscosity of Magmas. The nature of volcanic eruptions is highly dependent on magma viscosity and also on dissolved gas content. Silicate-rich magmas are typically formed at destructive plate boundaries, by partial melting and/or assimilation of crustal rocks (which are richer in silica than the rock of the mantle).
http://www.geolsoc.org.uk/ks3/gsl/education/resources/rockcycle/page3655.html
Best Answer: There are several factors: Higher temperature creates lower viscosity (more flow-able) Higher silica content creates higher viscosity (more sticky) Higher dissolved gas content creates higher viscosity Landscapes are affected by lava viscosity greatly.
https://answers.yahoo.com/question/index?qid=20070509103205AAYsly5
There are two factors that affect the viscosity of glycerol, which means there are probably two factors that affect the viscosity of magma. The higher the temperature of the glycerol the less viscous it is. Granitic magma is hotter than basaltic so it is likely that it basaltic will be thicker. ...read more.
http://www.markedbyteachers.com/gcse/science/investigation-into-the-factors-that-affect-the-viscosity-of-magma.html
Viscosity in lava is chiefly influenced by temperature, and the presence of gases. The higher the temperature of a given lava flow, the lower the viscosity. A particular lava may initially flow rapidly, but as temperature decreases, viscosity will increase, and alter the type of flow. The presence of dissolved gases called volatiles also plays a key role in lava flow, and type of eruption.
https://answers.yahoo.com/question/index?qid=20070509103205AAYsly5
Investigation into the Factors that affect the Viscosity of Magma Background. Magma is molten material beneath or within the earth's crust, from which igneous rock is formed. Magma can only be in places that are hot enough to melt rocks. When magma is formed it rises to the surface through the earth's crust.
http://www.markedbyteachers.com/gcse/science/investigation-into-the-factors-that-affect-the-viscosity-of-magma.html
Magma can have different compositions depending on how it was formed. Magma also varies in temperature, and in how much dissolved gas it contains. All of these factors control the viscosity of the magma (whether it is relatively runny or very thick and sticky). Viscosity, in turn, controls how magma behaves as it rises through the crust, and erupts at the surface.
http://www.geolsoc.org.uk/ks3/gsl/education/resources/rockcycle/page3595.html
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.
http://www.geolsoc.org.uk/ks3/gsl/education/resources/rockcycle/page3655.html
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.
https://answers.yahoo.com/question/index?qid=20070509103205AAYsly5
what factors control the viscosity of the magma?
The factors that controls the viscosity of the magma are the higher the temperature of the glycerol the less viscous it is. Temperature is a factor that controls the viscosity of the magma.