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