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Is felsic magma viscous?
Yes. Felsic magma is very viscous.
Which is the most abundant in magma and has the greatest effect on its characteristics?
Felsic magma tends to be thick and viscous, while mafic magma tends to be fluid.
Which magma is most likely to quench congeal to a natural glass?
highly viscous; cools quickly
Which of the following causes a magma to be less viscous?
fewer silicate chains in the magma
An explosive eruption occurs if magma is?
Eruptions are explosive if the magma is viscous and has a high gas content.
What are the magma types in order of decreasing viscosity?
Most viscous Felsic magma i.e. rhyolite Intermediate magma i.e. andersite Mafic magma i.e. Basalt Ultramafic magma i.e. Komatiite Least viscous
Is felsic magma viscous?
Yes. Felsic magma is very viscous.
Which is the most abundant in magma and has the greatest effect on its characteristics?
Felsic magma tends to be thick and viscous, while mafic magma tends to be fluid.
What is Silica rich thick magma called?
The three types of magma, named for the rock they form are basaltic, rhyolitic and andesitic. Rhyolitic magma is rich in silica and water vapor.
Which magma is most likely to quench congeal to a natural glass?
highly viscous; cools quickly
Which of the following causes a magma to be less viscous?
fewer silicate chains in the magma
Is felsic magma eruptive?
Not usually. Because it is so viscous, felsic magma does not erupt as easily as mafic magma. While eruptions of felsic magma do occur, most felsic rocks are intrusive, meaning they solidify underground.
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)
An explosive eruption occurs if magma is?
Eruptions are explosive if the magma is viscous and has a high gas content.
How is strength of a volcano eruption related to the magma in the volcano?
If the magma is more viscous, the eruption is stronger.
How will stiff magma create an explosive eruption?
The more viscous or "stiff" types of magma usually contain more trapped gasses. When the magma reaches lower pressure near the surface, the gasses expand explosively, blasting ash and pumice into the air.
What effect does silicia content have on the characteristics of magma?
Silica-rich magma is much more thick and viscous.
