Question

question 3 (20 points) listen the viscosity of magma is lowered by __________. all of these decreasing crystal content increasing temperature decreasing sio2 question 4 (20 points)

Explanation:

Increasing temperature makes magma flow - like substances move more freely, decreasing crystal content reduces internal resistance, and decreasing silica ($SiO_2$) content lowers the polymerization degree of magma, all of which lower magma viscosity.

Answer:

all of these