Podcast
Questions and Answers
What is the purpose of the magma chamber in a volcano?
What is the purpose of the magma chamber in a volcano?
- To form a conical shape
- To store magma until it is released (correct)
- To produce gaseous materials
- To create pyroclastic fragments
Which type of volcano is characterized by low viscosity lava and broad sloping sides?
Which type of volcano is characterized by low viscosity lava and broad sloping sides?
- Fissure volcano
- Shield volcano (correct)
- Composite volcano
- Cinder cone volcano
What typically happens during the eruption phase of a volcano?
What typically happens during the eruption phase of a volcano?
- Lava begins to solidify around the main vent
- The volcano becomes dormant for a long period
- Steam and shaking are observed at the surface
- The magma chamber may become empty and collapse (correct)
Which of the following describes an active volcano?
Which of the following describes an active volcano?
What term describes volcanic formations that develop when lava escapes and builds secondary structures?
What term describes volcanic formations that develop when lava escapes and builds secondary structures?
What primarily forms a cinder cone volcano?
What primarily forms a cinder cone volcano?
Which type of volcano is characterized by a symmetrical cone and explosive eruptions?
Which type of volcano is characterized by a symmetrical cone and explosive eruptions?
During which phase of a volcano do signs like steam, rubble, and shaking occur?
During which phase of a volcano do signs like steam, rubble, and shaking occur?
What is the defining characteristic of a dormant volcano?
What is the defining characteristic of a dormant volcano?
Which component of a volcano serves as the path for magma to reach the Earth's surface?
Which component of a volcano serves as the path for magma to reach the Earth's surface?
Flashcards
Volcano Anatomy Part 1
Volcano Anatomy Part 1
Volcanoes have a main vent, a magma chamber, and a crater. Magma moves through the vent from the chamber to the surface.
Volcano Anatomy Part 2
Volcano Anatomy Part 2
A secondary cone forms when lava escapes the main vent, and a crater forms through the eruptions
Volcano Types: Cinder Cone
Volcano Types: Cinder Cone
Cinder cones are formed by pyroclastic fragments and volcanic ash, solidifying around the main vent.
Volcano Types: Composite/Strato Volcanoes
Volcano Types: Composite/Strato Volcanoes
Signup and view all the flashcards
Volcano Types: Shield Volcanoes
Volcano Types: Shield Volcanoes
Signup and view all the flashcards
Volcano: What is it?
Volcano: What is it?
Signup and view all the flashcards
What is a Magma Chamber?
What is a Magma Chamber?
Signup and view all the flashcards
Cinder Cone Volcano
Cinder Cone Volcano
Signup and view all the flashcards
Composite/Strato Volcano
Composite/Strato Volcano
Signup and view all the flashcards
Shield Volcano
Shield Volcano
Signup and view all the flashcards
Study Notes
Volcanoes
- Erupts molten rocks, fragments, and gaseous materials
- Can be a vent (hole in the earth)
- Vulcano (Italian) - burning mountain
- Vulcan (Roman God of Fire)
Volcano Anatomy
- Main Vent: Magma passes through the magma chamber to reach the Earth's surface.
- Magma Chamber: Magma is stored/located
- Crater: Bowl-shaped depression made by eruption.
- Secondary Cone: Formed when lava escapes, also called "parasitic cones."
Volcano Types by Shape
- Cinder Cone: Made by pyroclastic fragments and volcanic ashes.
- Solidify around the main vent to form a cone.
- Circular or oval shape (e.g., Babuyan Claro, C. Smith Volcano).
- Conical shape
- Composite/Strato Volcanoes: Mostly symmetrical cones, steep, rise high (e.g., 2400 ft). Lava solidifies (sticky). Acidic (fast-solidifying). (e.g., Mayon Volcano, Mount Fuji)
- Shield Volcanoes: Low viscosity lava, broad sloping sides, and shield-like shape. Not explosive (e.g., volcanoes in Hawaii)
Volcano Types by Eruptive History
- Active: Has erupted in the last 600 years or at least erupted once in 10,000 years
- Dormant: Active but didn't erupt in the last 10,000-20,000 years
- Extinct: Not expected to erupt
Phases of Volcanoes
- Preparation: Volcano is being filled with magma; steam/shaking can be observed; Volcano is getting hotter.
- Eruption: Magma goes out.
- Ending: Magma chamber empties; may collapse to a crater because it's weakened.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
