Podcast
Questions and Answers
At which type of plate boundary is volcanic activity least likely to occur?
At which type of plate boundary is volcanic activity least likely to occur?
- Hot spots
- Convergent boundaries
- Transform boundaries
- Divergent boundaries (correct)
What geological feature is associated with a high concentration of volcanoes due to numerous convergent boundaries?
What geological feature is associated with a high concentration of volcanoes due to numerous convergent boundaries?
- The Himalayas
- The East African Rift Valley
- The Mid-Atlantic Ridge
- The Ring of Fire (correct)
Which volcanic term describes the tube through which lava erupts onto the surface?
Which volcanic term describes the tube through which lava erupts onto the surface?
- Crater
- Cone
- Neck (correct)
- Magma chamber
Where does magma accumulate beneath a volcano before an eruption?
Where does magma accumulate beneath a volcano before an eruption?
Which term describes a volcano that will not erupt again?
Which term describes a volcano that will not erupt again?
What is a key characteristic of a dormant volcano?
What is a key characteristic of a dormant volcano?
What best describes an active volcano?
What best describes an active volcano?
Which type of volcano is typically characterized by its classic single mountain shape, thick lava, and explosive eruptions?
Which type of volcano is typically characterized by its classic single mountain shape, thick lava, and explosive eruptions?
Which characteristic is commonly associated with composite volcanoes?
Which characteristic is commonly associated with composite volcanoes?
Which set of characteristics is typical of composite volcanoes?
Which set of characteristics is typical of composite volcanoes?
What type of lava flow is most likely to be associated with a composite volcano?
What type of lava flow is most likely to be associated with a composite volcano?
Which type of volcano is most likely to generate pyroclastic flows?
Which type of volcano is most likely to generate pyroclastic flows?
What term describes a volcano that erupts lava from a hole other than the main crater?
What term describes a volcano that erupts lava from a hole other than the main crater?
Andesitic composition is said to be medium in every way, what would be the opposite of this?
Andesitic composition is said to be medium in every way, what would be the opposite of this?
Which of the following is most likely associated with subducting oceanic plates?
Which of the following is most likely associated with subducting oceanic plates?
What type of plate boundary typically has volcanic activity where lava comes up between plates?
What type of plate boundary typically has volcanic activity where lava comes up between plates?
Where are hot spots typically located?
Where are hot spots typically located?
Which rock type is the opposite of granite, often found in shield volcanoes?
Which rock type is the opposite of granite, often found in shield volcanoes?
Which location is an example of an active volcanic area known for its low dissolved gasses and low pressure?
Which location is an example of an active volcanic area known for its low dissolved gasses and low pressure?
Flashcards
Where are volcanoes found?
Where are volcanoes found?
Occur at plate boundaries, including convergent and divergent boundaries. Also found at hot spots.
Divergent boundaries
Divergent boundaries
Volcanic activity occurs where lava comes up between plates, but usually no volcanoes.
Ring of Fire
Ring of Fire
Area around the Pacific Ocean with high volcanic activity due to many convergent boundaries.
Volcanic Neck
Volcanic Neck
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Volcanic Cone
Volcanic Cone
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Crater
Crater
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Magma Chamber
Magma Chamber
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Extinct Volcano
Extinct Volcano
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Dormant Volcano
Dormant Volcano
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Active Volcano
Active Volcano
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Composite Cone
Composite Cone
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Cydner cone
Cydner cone
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Study Notes
- Volcanoes are found at plate boundaries
Plate Boundaries
- Convergent boundaries are typically ocean/land or ocean/ocean boundaries
- Subducting oceanic plates melt, causing rising magma and volcanoes at convergent boundaries
- Divergent boundaries produce volcanic activity due to lava rising between plates, but usually without volcanoes
- Hot spots in the asthenosphere can cause sporadic volcanoes that rise between plates
Ring of Fire
- It's an area around the Pacific Ocean characterized by high volcanic activity
- The high amount of volcanic activity is due to the presence of many convergent boundaries
Volcano Terms
- Neck: The tube where lava erupts
- Cone: The exterior structure made of igneous rock
- Crater: The opening at the top where lava erupts
- Magma chamber: Where magma gathers and builds pressure before an eruption
Eruption terms
- Extinct: Volcano will never erupt again
- Dormant: Volcano hasn't erupted recently, but could erupt again if there is still magma
- Active: Volcano is currently erupting or has erupted recently, showing signs of volcanic activity (e.g., Hawaii)
- Composite cone: Classic single mountain volcano, found at convergent boundaries, has thick lava and causes explosive eruptions
Composite Cone Attributes
- High silica content
- Granitic composition
- Low temperature
- Slow-moving lava
- Tall cone shape
- Convergent boundary location
- Explosive eruptions
- Infrequent eruptions
- Viscous lava
- High pressure
- Pyroclastic flow
Andesitic
- Medium in every way
Opposite of Composite
- No dissolved gasses
- Low pressure
- Eruptions like in Hawaii
- Less frequent eruptions
- Basaltic
- Shield
Cydner Cone
- When lava comes out of different hole in volcano
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