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Questions and Answers
Which of the following statements is true regarding the classification of volcanoes as active or inactive?
Which of the following statements is true regarding the classification of volcanoes as active or inactive?
- The classification is based solely on the viscosity of the magma, with high viscosity indicating an active volcano.
- Records of volcanic eruptions are the sole basis for classifying volcanoes as active or inactive.
- The historical timeline method considers a volcano active if it has erupted within the past 10,000 years. (correct)
- Volcanoes with a high silica content are always classified as active, regardless of their eruption history.
What is the primary factor that determines the explosiveness of a volcanic eruption?
What is the primary factor that determines the explosiveness of a volcanic eruption?
- The silica content and viscosity of the magma. (correct)
- The presence of groundwater near the magma chamber.
- The type of eruption, such as Plinian or composite.
- The height and shape of the volcano.
Which of the following statements accurately describes the formation of volcanic belts?
Which of the following statements accurately describes the formation of volcanic belts?
- Volcanic belts form along the boundaries of Earth's tectonic plates. (correct)
- Volcanic belts form in regions with a high concentration of hot springs.
- Volcanic belts form in areas with frequent small earthquakes.
- Volcanic belts form in regions with high silica content in the Earth's crust.
What is the term used to describe the molten material or rocks inside the Earth that are ejected during a volcanic eruption?
What is the term used to describe the molten material or rocks inside the Earth that are ejected during a volcanic eruption?
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Which of the following statements accurately describes hot springs?
Which of the following statements accurately describes hot springs?
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What is the significance of detecting many small earthquakes near a volcano?
What is the significance of detecting many small earthquakes near a volcano?
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