At the same temperature, why are magmas with high silica contents more viscous?
A) The magmas with high silica content are also richer in iron and too dense to flow.
B) Any magma with more than 50% silica content is too sticky to flow.
C) Because high viscosity magma will flow more readily and rhyolites flow the farthest.
D) They are more linked together in chains and nets that are strong enough to resist flow.

Question

Quizplus · Accepted Answer

Silica molecules in magma tend to link together, forming long chains and networks. These interconnected structures increase the magma's resistance to flow, making it more viscous.

At the Same Temperature, Why Are Magmas with High Silica