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