Question

what conditions make for a weak volcanic eruption?
a. magma with high gas content
b. magma that cannot flow easily
c. magma with high silica content
d. magma with low viscosity

Explanation:

• Option A: High - gas - content magma leads to explosive eruptions as the gas expands rapidly.
• Option B: Magma that cannot flow easily (high viscosity) is associated with more explosive eruptions as it traps gas.
• Option C: High - silica - content magma is more viscous and prone to explosive eruptions.
• Option D: Low - viscosity magma flows easily, allowing gas to escape gradually, resulting in weak eruptions.

Answer:

D. Magma with low viscosity