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) Andesitic magma
C) Ultrapotassic magma
D) Rhyolitic 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) 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) Geology
B) Volcanology
C) Seismology
D) Meteorology
- 6. What term is used for the shape formed by multiple layers of lava and ash from explosive eruptions?
A) Stratovolcano
B) Shield volcano
C) Caldera
D) Cinder cone
- 7. What is the volcanic term for the opening through which lava erupts?
A) Crater
B) Dome
C) Fissure
D) Vent
- 8. Which country is home to the Nevado del Ruiz volcano?
A) Colombia
B) Peru
C) Mexico
D) Ecuador
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