What primary factors determine the nature of volcanic eruptions?
The primary factors that determine the nature of volcanic eruptions include the magma’s temperature its composition and the amount of dissolved gases it contains. As lava cools it begins to congeal and as viscosity increases its mobility decreases. The viscosity of magma is directly related to its silica content.
What primary factors determine the nature of volcanic eruptions quizlet?
what are the primary factors that determine the nature of volcanic eruptions? The magma’s composition it’s temperature and the amount of dissolved gases it contains.
What are the two main factors that determine the type of volcanic eruption?
The two main factors that influence how a volcano will erupt are viscosity and gas content. Both are related to the composition of the magma.
What factors determine the type of volcanic eruption quizlet?
What factors determine the type of volcanic eruption? Magma composition magma temperature and the amount of dissolved gasses in the magma.
What is one factor that determines how explosive a volcanic eruption?
The amount of water vapor and other gases present is one factor that determines whether a volcanic eruption will be quiet or explosive.
What are the two primary factors that determine how magma erupts quizlet?
The two primary factors that determine how magma erupts is its viscosity and gas content.
What factors determine the type of magma found in a volcano?
Different minerals within a rocks melt at different temperatures and the amount of partial melting and the composition of the original rock determine the composition of the magma. Magma collects in magma chambers in the crust at 160 kilometers (100 miles) beneath the surface of a volcano.
What determines the form of a volcano?
When magma erupts at the surface as lava it can form different types of volcano depending on: … the amount of gas in the magma. the composition of the magma. the way in which the magma reached the surface.
What lies underneath volcanic features at Earth’s surface quizlet?
What lies underneath volcanic features at Earth’s surface? Magma chambers and volcanic conduits.
What are the 3 primary factors affecting the volcanoes eruptive style?
The style of eruption depends on a number of factors including the magma chemistry and content temperature viscosity (how runny the magma is) volume and how much water and gas is in it the presence of groundwater and the plumbing of the volcano.
What are effusive and explosive eruptions What are the two primary factors that determine the nature of a volcanic eruption?
The style of a volcanic eruption depends on magma viscosity. Felsic magmas produce explosive eruptions. Mafic magmas produce effusive eruptions. Explosive eruptions happen along the edges of continents and produce tremendous amounts of material ejected into the air.
What are the volcanic eruptions?
What four factors determine a volcanic eruption?
The type of volcanic eruption is determined by the magma composition magma temperature and amount of dissolved gases. List the materials ejected from volcanoes. The materials ejected from volcanoes include lava gases and pyroclastic materials such as ash dust cinders volcanic blocks and volcanic bombs.
What are the factors that control whether an eruption is explosive or nonexplosive explain your answer?
The amount of dissolved gas in the magma provides the driving force for explosive eruptions. The viscosity of the magma however is also an important factor in determining whether an eruption will be explosive or nonexplosive.
What two factors control the explosiveness of an eruption quizlet?
What two factors control the explosiveness of an eruption? The amount of water vapor and silica in the magma.
What are three factors that determine how violently or quietly a volcano erupts?
The primary factors that determine whether a volcano erupts violently or quietly include magma composition magma tempera- ture and the amount of dissolved gases in the magma.
What two factors determine whether an eruption will be explosive or quiet?
|These two factors control whether an eruption will be explosive or quiet?||Water vapor and silica|
|Magma that is low in silica and produces nonexplosive eruptions is called?||basaltic|
|Magma that is high in silica and produces explosive eruptions is called?||granitic|
Which of the following factors help determine whether a volcanic eruption will be explosive or effusive?
Volcanic eruptions can be explosive sending ash gas and lava high up into the atmosphere or the magma can form lava flows known as effusive eruptions. Whether an eruption is explosive or effusive largely depends upon the amount of gas in the magma.
What factors increase the explosive potential of magma during a volcanic eruption?
Temperature of magma amount of dissolved gas in High viscosity and dissolved gas increase the explosive potential of a magma.
Which of the following is primarily responsible for explosive volcanic eruptions?
Although there are several factors triggering a volcanic eruption three predominate: the buoyancy of the magma the pressure from the exsolved gases in the magma and the injection of a new batch of magma into an already filled magma chamber.
What are the main gases released during a volcanic eruption quizlet?
What are the main gases released during a volcanic eruption? The main gas released from a volcanic eruption is water vapor along with carbon dioxide nitrogen and sulfur dioxide. These gases escape when pressure on the magma is reduced.
What characteristics of magma determines its explosiveness?
Viscosity together with the amount of gas dissolved in magma can determine the explosivity of the eruption. More viscous magma with volatiles is more explosive than less viscous magma where gases can bubble out relatively easily.
How magma composition affects the eruption of a volcano?
Magmas differ in composition which affects viscosity. Magma composition has a large effect on how a volcano erupts. Felsic lavas are more viscous and erupt explosively or do not erupt. Mafic lavas are less viscous and erupt effusively.
What kind of eruption is likely to occur in a volcano having magma that is low in silica explain your answer?
What kind of eruption is likely to occur in a volcano having magma that is low in silica? Explain your answer. This volcano is probably going to have a quiet eruption. Lave with silica is thin and runny which makes it flow and ooze easily and quietly from the vent.
What are the three factors to consider in identifying the category of a volcano?
- The volume of volcanic products.
- The interval length between eruptions.
- The composition of volcanic products.
- The variety of volcanic eruption types.
- The geometry of the vent.
- The environment into which the volcanic products are erupted.
Where do volcanic eruptions generally occur?
Which volcanic factor below primarily determines the physical characteristics of a volcano?
The physical properties of its magma determine how a volcano erupts. Whether an eruption is quiet or explosive depends on the magma’s silica content and viscosity.
What is underneath volcanic features at Earth’s surface?
A magma chamber is a pool of molten rock material located beneath the Earth’s surface. Over long periods of time magma chambers can crystallize into large intrusive igneous rock formations called batholiths. Magma chambers can be the source of both magma and lava.
What lies underneath volcanic features at Earth’s surface Group of answer choices?
What lies underneath volcanic features at Earth’s surface? … A sill leads to volcanoes above sedimentary layers and a dike leads to volcanoes below sedimentary layers. A dike intrudes across sedimentary layers and a sill intrudes between sedimentary layers.
How do mafic volcanic rocks get to Earth’s surface quizlet?
How do mafic volcanic rocks get to Earth’s surface? Pressure from overlying crust forces mantle magmas through cracks to Earth’s surface. These magmas erupt out of volcanoes cool and solidify into rock. Dark colored glassy rock that usually forms when highly silica rich lava cools quickly at Earth’s surface.
What primary factors determine the nature of volcanic eruptions How do these factors affect a magma’s viscosity?
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 are the 3 factors that affect the nature of an eruption?
There are three main factors that influence the violence of a volcanic eruption: 1. magma viscosity 2. magma temperature and 3. amount of dissolved gases.
What are the 6 types of volcanic eruptions?
What factors affect the explosiveness of a volcanic eruption?
An eruption explosive or otherwise depends on three fundamental factors: the nature of the magma the depth of the magma chamber below the surface and the excess pressure built up in the magma chamber (compared to what the pressure would be if an unobstructed column of magma extended to the surface).
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