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) Thermometer
B) Seismometer
C) Barometer
D) Anemometer
- 3. What is the main factor that influences the viscosity of magma?
A) Temperature
B) Gas content
C) Silica content
D) Color
- 4. What causes a caldera to form?
A) Erosion by water
B) Wind erosion
C) Lava flow hardening
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) Shield volcano
B) Cinder cone
C) Stratovolcano
D) Caldera
- 6. What is the study of volcanoes called?
A) Volcanology
B) Meteorology
C) Geology
D) Seismology
- 7. Which country is home to the Nevado del Ruiz volcano?
A) Ecuador
B) Peru
C) Mexico
D) Colombia
- 8. What is the volcanic term for the opening through which lava erupts?
A) Crater
B) Dome
C) Vent
D) Fissure
|