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Volcanoes Quiz

Volcanoes Quiz 1.Explain the difference in appearance of volcanoes that are low in silica vs. volcanoes that are high in silica. Specifically explain why do silica- poor magmas produce broad volcanoes with gentle slopes and why high- silica magmas tend to form volcanic domes with steep sides?

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Volcanoes Quiz

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  1. Volcanoes Quiz • 1.Explain the difference in appearance of volcanoes that are low in silica vs. volcanoes that are high in silica. Specifically explain why do silica- poor magmas produce broad volcanoes with gentle slopes and why high- silica magmas tend to form volcanic domes with steep sides? • 2.Name and describe the three types of volcanoes. How are they different? Which generally causes the largest eruptions? Name a volcano that falls into each category. • 3.Compare and contrast Mt. St. Helens in the Cascade Range to Mauna Loa in Hawaii. Explain how each was formed, how often they erupt, the eruptive violence, what the lava is made of, and if they are more likely to have a lava flow or a pyroclastic flow. • Word Bank: Hot spot, subduction zone, convergent plate boundary, silica content, water content, basalt, granite, andesite, viscosity

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