What are the three factors that influence viscosity of a lava?
A) depth of magma, temperature, ease of gas escaping to atmosphere
B) amount of gas, rhyolite, and vesicules in the magma
C) origin of the magma, plate tectonic setting, condensation
D) plate tectonic setting, thickness of the geosphere, amount of gas in the magma
E) silica content, temperature, dissolved gases

Question

Quizplus · Accepted Answer

Viscosity is primarily determined by the amount of silica in the magma, with higher silica content causing higher viscosity. Temperature is also a factor, with cooler magmas being more viscous. Dissolved gases can also affect the viscosity of the magma by decreasing it, as they create bubbles that reduce the overall resistance to flow.

What Are the Three Factors That Influence Viscosity of a Lava