ES-6.2-The Nature of Volcanic Eruptions

Multiple Choice

BELLRINGER:

Which volcanic eruption is described as the largest and most destructive in U.S. history, occurring on May 18, 1980?

• Mount St. Helens

• Kilauea

• Mount Rainier

• Mount Shasta

Multiple Choice

Which of the following factors plays a significant role in determining whether a volcanic eruption will be explosive or quiet?

• Magma composition

• Amount of rainfall

• Wind speed

• Sunlight exposure

Multiple Choice

Which type of magma is characterized by high silica content, lower temperature, and high gas content?

• Basaltic (Mafic)

• Andesitic (Intermediate)

• Rhyolitic (Felsic)

• Ultramafic

Multiple Select

Which of the following are places or processes where magma forms?

• Upper mantle melting

• Magma rises

• Ocean floor eruption

• Continental modification

Open Ended

Compare the characteristics and hazards of effusive eruptions and explosive eruptions.

Multiple Choice

What is a critical factor that determines the style of a volcanic eruption?

• Amount of rainfall

• Viscosity and gas content of magma

• Presence of vegetation

• Wind speed