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Question
Why does magma viscosity vary with silica content?A) Increasing silica increases a tendency for silica bonds to link up in networks, acting like a polymerization of the magma.
B) Increasing silica content lowers the melting temperature and since increasing the temperature of a magma decreases viscosity increasing silica content increases viscosity.
C) Increasing silica content increases the amount of water a magma can dissolve and water decreases magma viscosity, so increasing silica content decreases magma viscosity.
D) There is no correlation between silica content and magma viscosity.
Answer
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