What does the viscosity of magma determine?
The higher the amount of silica in the magma, the higher is its viscosity. Viscosity is a liquid’s resistance to flow. Viscosity determines what the magma will do. Dissolved gases become trapped by thick magma and the magma chamber begins to build pressure.
What are three factors determine magma viscosity?
The three factors that influence the viscosity of a lava are temperature, the dissolved gases it contains, and its chemical composition.
What does it mean by lower viscosity magma?
Low viscosity magmas allow gases to escape easily whereas gas pressures can build up in high viscosity magmas – resulting in violent eruptions.
What determines the viscosity of magma quizlet?
The viscosity of magma depends upon its silica content and temperature.
What are the factors that affects the viscosity of magma?
Viscosity of Magmas 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).
What magma has the highest viscosity?
rhyolitic magma
The magma that has the highest viscosity is rhyolitic magma.
What are the factors affecting magma viscosity?
What are the 3 types of magma?
There are three basic types of magma: basaltic, andesitic, and rhyolitic, each of which has a different mineral composition. All types of magma have a significant percentage of silicon dioxide.
What is the relationship between viscosity and temperature quizlet?
An increase in temperature decreases liquid viscosity because the molecules have more energy to break away from the forces of attraction that hold them together.
What element has the greatest control on magma viscosity?
Of the ten most abundant elements found in magmas (see above), oxygen is the only anion. Silicon, on the other hand, is the most abundant cation. Thus, the Si-O bond is the single most important factor in determining the degree of a magma’s viscosity.
Which of the following is not a factor that affects the viscosity of magma?
Temperature Silica Content Amount of gas None of these affects the viscosity of the magma.
Which does not affect the viscosity of magma?
Question: Which of the following does not affect the viscosity of magma? Temperature Silica Content Amount of gas None of these affects the viscosity of the magma.
What two things does the viscosity of magma depend on?
Viscosity can be described as a resistance to flow; for example, honey is more viscous than water because it flows more slowly than water. Viscosity in magma depends on two things: temperature and silica content. The higher the temperature of the magma, the lower the viscosity.
What factors affect a magma’s viscosity?
JOHN FLORENTINO E. ECHON
What factors control the viscosity of magma and lava?
There are factors that control viscosity of magma, such as temperature, gas content, and silica content. Out of this, silica content of magma affects most in the viscosity. Magma with high silica content (felsic magma) has high internal friction, thus high viscosity.
How does gas affect viscosity of magma?
When gases begin to escape (exsolve) from the magma, the effect of gas bubbles on the bulk viscosity is variable. Although the growing gas bubbles will exhibit low viscosity , the viscosity of the residual liquid will increase as gas escapes.