Types of Volcanoes and Volcanic Processes Quiz

What is the primary reason volcanoes form?

• Earthquakes
• Plate tectonics and Earth's internal heat
• Weathering and erosion
• Ocean currents

Which type of plate boundary is NOT associated with significant volcanic activity?

• Convergent
• Divergent
• Transform
• Hotspot

The 'Ring of Fire' is an example of volcanism associated with which type of plate boundary?

• Convergent
• Divergent
• Transform
• Hotspot

What process occurs at a subduction zone that leads to volcano formation?

• Plates moving apart
• Melting of sinking plate
• Horizontal plate movement
• Surface erosion

Which of the following is NOT a key component of magma?

• Silica
• Dissolved gases
• Various minerals
• Oxygen

How does the gas content in magma affect eruption style?

• More gases lead to less explosive eruptions
• Gas content has no effect on eruptions
• More gases increase the potential for explosive eruptions
• Gases only affect the color of lava

What is viscosity in relation to magma?

• The temperature of the magma
• The gas content of the magma
• The resistance to flow
• The depth of the magma chamber

How does high viscosity magma typically affect volcanic eruptions?

• It leads to more effusive eruptions
• It results in less explosive eruptions
• It causes more explosive eruptions
• It has no effect on eruption style

What is the primary factor that determines magma viscosity?

• Temperature
• Pressure
• Silica content
• Gas content

How does higher temperature generally affect magma behavior?

• Increases viscosity
• Decreases viscosity
• Has no effect on viscosity
• Only affects gas content