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The science of how volcanoes erupt (e.g., Nevado del Ruiz)
  • 1. What type of magma is most associated with explosive volcanic eruptions?
A) Ultrapotassic magma
B) Rhyolitic magma
C) Basaltic magma
D) Andesitic magma
  • 2. What instrument is used to measure volcanic seismic activity?
A) Barometer
B) Seismometer
C) Thermometer
D) Anemometer
  • 3. What is the main factor that influences the viscosity of magma?
A) Color
B) Temperature
C) Gas content
D) Silica content
  • 4. What is the volcanic term for the opening through which lava erupts?
A) Fissure
B) Dome
C) Crater
D) Vent
  • 5. Which country is home to the Nevado del Ruiz volcano?
A) Peru
B) Colombia
C) Mexico
D) Ecuador
  • 6. What is the study of volcanoes called?
A) Seismology
B) Geology
C) Meteorology
D) Volcanology
  • 7. What term is used for the shape formed by multiple layers of lava and ash from explosive eruptions?
A) Shield volcano
B) Caldera
C) Cinder cone
D) Stratovolcano
  • 8. What causes a caldera to form?
A) Collapse of a volcanic cone after an eruption
B) Wind erosion
C) Lava flow hardening
D) Erosion by water
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