2. Which of the following is NOT a factor that influences the viscosity of magma?
A. amount of
pas
B. mass
C. silica content
D. temperature

3. What type of volcanic eruption which is very violent due to the contact between water and magma?
A. Phreatomagmatio
B. Plinian
C. Strombolian
D. Vulcanian

_ 4. What type of volcano is Mount Mayon?
A. Cinder cone
C. Lava Dome
B. Composite
C. Lava Dome
D. Shield cone​