18 Questions
What distinguishes shield volcanoes from other types of volcanoes?
Gently sloped profile
Which type of volcano is considered the most dangerous?
Composite Volcano
What is the main difference in magma composition between Magma Volcanoes and Shield Volcanoes?
Amount of silica
How are Shield Volcanoes primarily built up?
By many layers of low-viscous lava flows
What is a common feature of calderas formed at the summit of shield volcanoes?
Formation of new depressions
Which type of volcano is known for their huge, gently sloped profiles?
Shield Volcano
What is the term used to describe the property of a material's resistance to flow?
Viscosity
Which type of volcanic eruption is associated with explosive outbursts that generate pyroclastic flows?
Pelean
What type of volcanic eruption is characterized by effusions of molten basaltic lava that flow from long, parallel fissures?
Icelandic
How does the viscosity of a liquid change with an increase in temperature?
Viscosity decreases
Which factor increases with an increase in silica content in magma?
Viscosity
What factor affects the types of volcanic eruptions by influencing magma chemistry and content?
Volume
What is the term used once magma erupts through the Earth's surface?
Lava
Which type of volcano is formed by fluid lava ejected due to high pressure in the magma chamber?
Cinder Cone
What is the combination of the Earth's crust and the uppermost part of the mantle called?
Lithosphere
During which geological process does one tectonic plate move under another at convergent boundaries?
Subduction
Which type of volcano is also known as a stratovolcano and is formed by highly viscous or thick, slow-moving magma?
Composite
What is a mass of molten rock ejected during an eruption called?
Volcanic Bombs
Learn about how volcanoes are formed through the layering of lava and ash, and explore key terms like lava, ash cloud, and volcanic bombs. Understand processes like lithosphere and subduction that contribute to volcanic activities.
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