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Questions and Answers
What is the external bottom part of a volcano called?
Where does magma flow through in a volcano?
What is the huge circular depression with a diameter of thousand meters and depth of hundred meters called?
Where does the vent lie in a volcano?
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What is the sloping side of a volcano called?
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What is the term for a vent located on the side of a volcano?
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Where does magma accumulate underground in a volcano?
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What can magma solidify into when inside the magma chamber?
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What geographic feature is the Pacific Ring of Fire known for?
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Which country is mentioned for its active volcanoes in the text?
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Study Notes
External Structures of a Volcano
- The base of a volcano is the external bottom part that supports the entire body.
- The flank is the sloping side of a volcano.
- A vent is an opening where magma can flow out, usually located in the mouth of a volcano or circular depression called a crater.
- A caldera is a huge circular depression with a diameter of thousands of meters and a depth of hundreds of meters, formed by extreme volcanic eruptions.
Internal Structures of a Volcano
- The magma chamber is an underground open zone where magma accumulates.
- The conduit is the path where magma flows upward.
- The throat is the upper part of the conduit.
Formation of Volcanoes and Associated Features
- A flank vent is a smaller opening where magma may pass through, created on the side of a volcano.
- The accumulation of lava and ash layers can lead to the growth of a volcano and steepening of its slope.
- Extreme volcanic eruptions can create a caldera, which may later result in the formation of another volcano within the caldera.
Volcanic Regions
- The Pacific Ring of Fire is a horseshoe-shaped region where plate tectonics meet, separate, or slide next to each other.
- This region is prone to earthquakes and volcanic eruptions.
- Examples of active volcanoes in the Philippines include Mt. Pinatubo in Zambales and Mt. Mayon in Albay, Bicol.
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Description
Test your knowledge of the different parts and features of a volcano, from the base to the crater and beyond. Learn about vents, calderas, magma chambers, and more.
