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