What controls the viscosity of magma quizlet?
The viscosity of a magma is directly related to its silica content. The more silica in magma the greater its viscosity. Silica slows the flow of magma because silicate tends to form chain like molecules that tangle one another.
What factors control the viscosity of a melt?
Answer: Viscosity in a melt is controlled by its composition (specifically, silica content) and temperature. Temperature affects viscosity because heat causes chemical bonds to break more easily. Therefore, a hotter lava of a given composition is less viscous than a Page 2 cooler lava of the same composition.
What are the three factors that influence viscosity of a lava quizlet?
Three factors that affect magma viscosity are temperature, composition, and presence of dissolved gases.
Which of the following are ways that viscosity affect gases in magma?
Which of the following are ways that viscosity affects gases in magma? Viscous magma prevents gas from escaping easily.
What affects the viscosity of magma quizlet?
VISCOSITY is directly related to the amount of silica (sand) in the magma. As silica content increases, viscosity increases. The magma slows down.
How viscosity affects the movement of magma?
Heating reduces viscosity (warm syrup flows more easily than cold.) High viscosity lavas flow slowly and typically cover small areas. In contrast, low viscosity magmas flow more rapidly and form lava flows that cover thousands of square kilometers.
What factors affect the viscosity of magma?
Temperature, composition, and volatile (gas) content largely determine the viscosity of lava. Temperature: The hotter the lava, the lower the viscosity (the thinner it is). The cooler the lava, the higher the viscosity (the thicker it is).
What determines 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 is viscosity and what factors control it?
One can imagine the strength with which the molecules cling together, which will be proportional to the friction. This strength is known as viscosity. Viscosity determines the friction amount, which determines the amount of energy absorbed by the flow.
What three things control the viscosity of magma?
A magma's viscosity is largely controlled by its temperature, composition, and gas content (see downloadable programs at the bottom of this page). The effect of temperature on viscosity is intuitive. Like most liquids, the higher the temperature, the more fluid a substance becomes, thus lowering its viscosity.
How does the viscosity of the magma influence the type of eruption?
Ultimately, the viscosity of a magma will determine the shape a volcano takes over continued eruptions. A magma's silica content will not only control the rock type that forms, it also controls the relative viscosity of the magma. Differences in a magma's viscosity will determine the shape a volcano takes.
Which substance affects the viscosity of magma?
A magma's viscosity is largely controlled by its temperature composition and gas content (see downloadable programs at the bottom of this page). The effect of temperature on viscosity is intuitive. Like most liquids the higher the temperature the more fluid a substance becomes thus lowering its viscosity.
What controls the viscosity of magma?
A magma's viscosity is largely controlled by its temperature, composition, and gas content (see downloadable programs at the bottom of this page). The effect of temperature on viscosity is intuitive. Like most liquids, the higher the temperature, the more fluid a substance becomes, thus lowering its viscosity.
How can viscosity control the shape of a volcano?
Ultimately, the viscosity of a magma will determine the shape a volcano takes over continued eruptions. A magma's silica content will not only control the rock type that forms, it also controls the relative viscosity of the magma. Differences in a magma's viscosity will determine the shape a volcano takes.
What are the factors that affect viscosity?
Increase in temperature decreases viscosity. Increases in pressure increase viscosity in liquids. In water, it decreases whereas, in gases, it remains the same.
- Increase in temperature decreases viscosity.
- Increases in pressure increase viscosity in liquids. In water, it decreases whereas, in gases, it remains the same.
How does viscosity affects the movement of magma?
How does viscosity affects the movement of magma? Heating reduces viscosity (warm syrup flows more easily than cold.) High viscosity lavas flow slowly and typically cover small areas. In contrast low viscosity magmas flow more rapidly and form lava flows that cover thousands of square kilometers.
How does viscosity work?
Viscosity is a measure of a fluid's resistance to flow. A fluidwith large viscosity resists motion because its molecular makeup gives it a lot of internal friction. A fluid with low viscosity flows easily because its molecular makeup results in very little friction when it is in motion.
What does viscosity depend on?
The viscosity of a liquid usually depends on its temperature. Viscosity generally decreases as the temperature increases. Viscosity generally increases as the temperature decreases. The viscosity of a liquid is related to the ease with which the molecules can move with respect to one another.
What are the 3 factors of viscosity?
Those are:
- Fluid Temperature: Usually the viscosity of liquids decreases with an increase in temperature. …
- Flow Conditions: For laminar flow the viscosity of liquid remains constant while for turbulent flow viscosity changes.
- Pressure: With an increase in pressure, the viscosity of gases usually increase.
What does magma viscosity depend on?
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).
How does viscosity affect the movement of magma?
How does viscosity affects the movement of magma? Heating reduces viscosity (warm syrup flows more easily than cold.) High viscosity lavas flow slowly and typically cover small areas. In contrast low viscosity magmas flow more rapidly and form lava flows that cover thousands of square kilometers.
How does viscosity affect volcanoes?
Ultimately, the viscosity of a magma will determine the shape a volcano takes over continued eruptions. A magma's silica content will not only control the rock type that forms, it also controls the relative viscosity of the magma. Differences in a magma's viscosity will determine the shape a volcano takes.
How does a viscometer work?
This type of viscometer uses a rotating apparatus, known as a spindle, which you submerge within the fluid you are testing. The torque on the rotating shaft of the spindle will then measure the fluid's resistance to flow. The rotational viscometer measures the absolute viscosity of the fluid.
How does viscosity affect flow?
Viscosity in general terms is a measure of the fluid's resistance to flow. The greater the viscosity, the greater the fluid's resistance to flow.
How does viscosity cause viscosity?
Viscosity is a measure of the resistance of a fluid towards being deformed when under shear stress. Hence, it is also known as shear viscosity. It is caused by the attractive forces between molecules in close contact, and the friction between molecular chains.
What is factor of viscosity?
Viscosity describes how thick and sticky the lava is, which influences how fast it flows. The two main factors that affect viscosity are temperature and silica content.
What determines the viscosity of lava quizlet?
–Lava – molten rock at the surface. -Viscosity depends upon temperature & magma composition (most important).
What is the principle of viscosity?
The principle of Viscosity is stated here: When a layer of Liquid is subjected to move upon a surface or another layer of the same Liquid, the Fluid particles tend to oppose such movement; this resisting force developed by a Liquid is called Viscosity.
Where is viscometer used?
Applications of viscometers Viscometers have wide and varied applications in the materials science and chemical industries for materials such as oil, asphalt, plastics, wax, paints, coatings, and adhesives. They are also used for food and beverages and personal-care products such as cosmetics, shampoo, and toothpaste.
How does viscosity affect velocity?
Fluid velocity through porous media is approximated as inversely proportional to the kinematic viscosity. A decrease in viscosity therefore increases the velocity of a compound through porous media.