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) Ultrapotassic magma
C) Rhyolitic magma
D) Basaltic magma
- 2. What instrument is used to measure volcanic seismic activity?
A) Thermometer
B) Barometer
C) Seismometer
D) Anemometer
- 3. What is the main factor that influences the viscosity of magma?
A) Color
B) Gas content
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) Seismology
C) Geology
D) Meteorology
- 6. What term is used for the shape formed by multiple layers of lava and ash from explosive eruptions?
A) Shield volcano
B) Cinder cone
C) Caldera
D) Stratovolcano
- 7. What is the volcanic term for the opening through which lava erupts?
A) Vent
B) Fissure
C) Dome
D) Crater
- 8. Which country is home to the Nevado del Ruiz volcano?
A) Mexico
B) Peru
C) Ecuador
D) Colombia
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