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