The nature of a volcanic eruption is determined largely by the ________ of the magma.
A) pressure
B) color
C) density
D) chemistry
E) none of the above

Question

Quizplus · Accepted Answer

The chemistry of the magma determines its viscosity, which in turn affects the eruption style. For example, high-silica magmas are more viscous and result in explosive eruptions, whereas low-silica magmas are less viscous and result in effusive eruptions. Pressure, color, and density may also play a role in volcanic eruptions, but their importance is secondary to the chemistry of the magma.

The Nature of a Volcanic Eruption Is Determined Largely by the ________