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