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