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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) Andesitic magma
C) Rhyolitic magma
D) Basaltic magma
  • 2. What instrument is used to measure volcanic seismic activity?
A) Seismometer
B) Barometer
C) Anemometer
D) Thermometer
  • 3. What is the main factor that influences the viscosity of magma?
A) Color
B) Temperature
C) Gas content
D) Silica content
  • 4. What causes a caldera to form?
A) Erosion by water
B) Lava flow hardening
C) Collapse of a volcanic cone after an eruption
D) Wind erosion
  • 5. What is the study of volcanoes called?
A) Volcanology
B) Meteorology
C) Seismology
D) Geology
  • 6. What is the volcanic term for the opening through which lava erupts?
A) Vent
B) Fissure
C) Dome
D) Crater
  • 7. Which country is home to the Nevado del Ruiz volcano?
A) Mexico
B) Ecuador
C) Colombia
D) Peru
  • 8. 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
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