Magma Composition and Viscosity

Front

What is molten rock that has formed deep within the Earth?

Back

Magma

Front

Volcanoes are found... Options: on land, under water, on islands, all of the above

Back

all of the above

Front

What is the most explosive type of magma? Options: Rhyolitic Magma, Andesitic Magma, Basaltic Magma

Back

Rhyolitic Magma

Front

Which type of magma has the lowest gas content? Options: Basaltic Magma, Andesitic Magma, Rhyolitic Magma

Back

Basaltic Magma

Front

Usually found at subduction zones

Back

Andesitic Magma

Front

As the temperature of lava increases, ________

Back

its viscosity decreases

Front

Basaltic lave flows are usually _________

Back

non-explosive

Front

Which types of magma contains the least amount of (silica) SiO₂ ? Options: rhyolitic, andesitic, felsic, basaltic

Back

basaltic

Front

Which list places the magma types in order of decreasing viscosity (most viscous listed first)? Options: basaltic, andesitic, rhyolitic, rhyolitic, andesitic, basaltic, andesitic, basaltic, rhyolitic, basaltic, rhyolitic, andesitic

Back

rhyolitic, andesitic, basaltic

Front

What type of magma is found at a continental hot spot such as Yellowstone?

Back

Rhyolitic