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What causes a magma to be less viscous?
The main cause of an explosive volcano is the amount of gases trapped in the magma. If the gases have had time to escape, there will be less pressure built up resulting in a less vicious magma explosion.
Is felsic magma viscous?
Yes. Felsic magma is very viscous.
What is the relationship between silicon content and the viscosity of magma?
Higher silicon content in magma leads to higher viscosity. This is because silicon tetrahedra form polymerized chains that hinder flow, making the magma more viscous. Lower silica content results in lower viscosity magma.
Which property of magma will change the viscosity?
Silica content determines viscosity. The higher the silica content the more viscous (slower moving). Ultramafic <45% silica Least viscous Mafic 45-52% Silica Intermediate 53-65% Silica Felsic >65% Silica Highly viscous
How does the silica content and the temperature affect the consistency of the magma?
The silica content in magma significantly influences its viscosity; higher silica levels lead to more viscous magma, making it thicker and less fluid. Conversely, lower silica content results in a more fluid magma. Temperature also plays a crucial role; as temperature increases, magma becomes less viscous and more mobile. Together, these factors determine how easily magma can flow and erupt, influencing volcanic activity.
What causes a magma to be less viscous?
The main cause of an explosive volcano is the amount of gases trapped in the magma. If the gases have had time to escape, there will be less pressure built up resulting in a less vicious magma explosion.
Is felsic magma viscous?
Yes. Felsic magma is very viscous.
What is the relationship between silicon content and the viscosity of magma?
Higher silicon content in magma leads to higher viscosity. This is because silicon tetrahedra form polymerized chains that hinder flow, making the magma more viscous. Lower silica content results in lower viscosity magma.
What are the two types of magma and what makes them different?
I'm not sure... but the two different types of lava are: Viscous - sticky and slow moving, resulting in tall volcanoes Non Viscous - runny and fast moving, resulting in short and very spread out volcanoes (shield volcanoes)
Which property of magma will change the viscosity?
Silica content determines viscosity. The higher the silica content the more viscous (slower moving). Ultramafic <45% silica Least viscous Mafic 45-52% Silica Intermediate 53-65% Silica Felsic >65% Silica Highly viscous
What is silicia and how does it affect how well magma will flow?
The more silica, the slower the lava flows and the more viscous it is.
How does the silica content and the temperature affect the consistency of the magma?
The silica content in magma significantly influences its viscosity; higher silica levels lead to more viscous magma, making it thicker and less fluid. Conversely, lower silica content results in a more fluid magma. Temperature also plays a crucial role; as temperature increases, magma becomes less viscous and more mobile. Together, these factors determine how easily magma can flow and erupt, influencing volcanic activity.
What is a magmas viscosity related to?
The silica content. A higher silica content results in a more viscous magma.
What is the relationship between the viscosity of a magma and its temperature?
Material that forms magma contains a lot of dissolved gas. When this dissolved gas expands it forms small gas bubbles called vesicles. The more gas bubbles contained in the magma, the more violent the eruption. In magmas with a higher temperate gases remain dissolved, lowering its viscosity. A higher temperature also means a lower density - lava will be runny (less viscous). When temperatures are lower crystallisation occurs, forming a more solid magma with a much higher viscosity. In viscous magmas the gases have a more difficult time escaping, causing a more violent eruption.
This type of magma is thick moves slowly and does not flow well?
The type of magma you are referring to is called viscous magma. It is rich in silica and other minerals, making it thick and sticky. As a result, it does not flow easily and tends to form domes or plugs when it erupts.
How high can volcanic eruptions occur into the air?
That all depends on how viscous the magma (though out of the earth it's called lava) is. More viscous, the bigger and higher it gets. The less viscous, the less violent the explosion can and will be.
Why does granitic magma cause explosive eruptions?
Granitic magma is highly viscous (resists flow). This high viscosity results in the entrapment and buildup of gases which create explosive eruptions.
