Which of the following causes magma to be less viscous?
A) a lower temperature
B) fewer silicate chains in the magma
C) a more felsic composition
D) a higher percentage of crystals
E) none of these

Question

Quizplus · Accepted Answer

Fewer silicate chains in the magma lead to a lower viscosity because the chains create a more complex, interconnected structure that resists flow. Less complex magmas, with fewer silicate chains, flow more easily.

Which of the Following Causes Magma to Be Less Viscous