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