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Volcano - Quiz
Contributed by: Marsh
  • 1. What is the minimum volume of volcanic deposits required for a volcano to be classified as a supervolcano?
A) 100 cubic kilometres
B) 1,000 cubic kilometres
C) 500 cubic kilometres
D) 2,000 cubic kilometres
  • 2. What type of magma is typically found in the magma chamber of a supervolcano?
A) Low-viscosity mafic magma
B) Gas-rich, silicic magma
C) Gas-poor, iron-rich magma
D) Water-rich, basaltic magma
  • 3. What is the result of a catastrophic caldera-forming eruption?
A) Formation of a flood basalt field
B) Emptying of a large magma chamber
C) Decrease in local vegetation
D) Creation of a new mountain range
  • 4. How many supervolcano eruptions have been identified in the last million years?
A) Zero
B) Ten
C) Sixty
D) Four
  • 5. Why can supervolcano eruptions cause a cooling of global temperatures?
A) Absorption of sunlight by lava flows
B) Release of sulfur and ash into the atmosphere
C) Increase in oceanic water volume
D) Destruction of forests worldwide
  • 6. Which of the following is a known location of a supervolcano?
A) Yellowstone Caldera
B) Mount Saint Helens
C) Mount Kilimanjaro
D) Mount Fuji
  • 7. What makes identifying supervolcanoes in the geologic record difficult?
A) Their ash disappears after a few years
B) They are too small to be noticed
C) Concealment under vegetation and glacial deposits
D) They are always located in the deep ocean
  • 8. What is a caldera?
A) A collapsed crater
B) A type of volcanic ash
C) A layer of cooled lava
D) A submarine vent
  • 9. What are lakes inside a caldera called?
A) Pillow lakes
B) Silicic basins
C) Volcanogenic lakes
D) Submarine basins
  • 10. How many submarine volcanoes have had documented activity during the Holocene Epoch?
A) Four
B) One million
C) Sixty
D) 119
  • 11. What is the estimated number of geologically young submarine volcanoes on the ocean floor?
A) More than one million
B) Exactly 119
C) Under 100
D) About 5,000
  • 12. What prevents the explosive release of steam and gases in deep ocean basins?
A) Tremendous weight of the water
B) Rapid cooling of the water
C) Low pressure at the sea floor
D) Presence of pillow lava
  • 13. What is a common eruptive product of submarine volcanoes?
A) Pillow lava
B) Silicic glass
C) Basaltic flood plains
D) Ash flow tuffs
  • 14. What organisms live near hydrothermal vents near submarine volcanoes?
A) Photosynthetic algae
B) Tropical fish
C) Large coral colonies
D) Chemotrophs
  • 15. What caused the mysterious humming sounds detected in 2018?
A) Industrial activity on the ocean floor
B) Formation of a submarine volcano off Mayotte
C) Migration of whales
D) A major earthquake in the deep ocean
  • 16. How are submarine eruptions detected in deep ocean basins?
A) Hydrophones and water discoloration
B) Satellite imagery
C) Monitoring of continental drift
D) Visible light from the surface
  • 17. What is the primary reason large submarine eruptions may not disturb the ocean surface?
A) The volcanoes are too small
B) Lack of volcanic gases
C) The water is too shallow
D) Rapid cooling and water buoyancy
  • 18. Which of the following is considered a supervolcano site?
A) Mount Etna
B) Lake Toba
C) Vesuvius
D) Mauna Loa
  • 19. How many large plates is the Earth's lithosphere broken into, according to plate tectonics?
A) Twenty
B) Ten
C) Sixteen
D) Eight
  • 20. What process in the underlying mantle causes tectonic plates to move?
A) Convection
B) Sublimation
C) Radiation
D) Evaporation
  • 21. What term describes volcanoes that have more than one period of activity?
A) Divergent
B) Monogenetic
C) Extinct
D) Polygenetic
  • 22. Where does most volcanic activity on Earth occur?
A) At the North Pole
B) Along plate boundaries
C) In the middle of continental plates
D) In the atmosphere
  • 23. What happens to the lithosphere at convergent boundaries?
A) It is destroyed
B) It remains unchanged
C) It turns into gas
D) It is created
  • 24. What happens to the lithosphere at divergent boundaries?
A) It disappears
B) It is created
C) It is destroyed
D) It melts instantly
  • 25. What are deep sea vents also known as?
A) Volcanic arcs
B) Magma chambers
C) Black smokers
D) Tectonic chimneys
  • 26. Which country is cited as an example of a mid-oceanic ridge above sea level?
A) Hawaii
B) Indonesia
C) Japan
D) Iceland
  • 27. What is the process where an oceanic plate dives beneath a continental plate called?
A) Expansion
B) Convection
C) Subduction
D) Divergence
  • 28. What process lowers the melting temperature of the mantle wedge in subduction zones?
A) Radioactive decay
B) Flux melting
C) Adiabatic cooling
D) Decompression melting
  • 29. What is a major characteristic of magma produced in subduction zones?
A) Low silica content
B) Low viscosity
C) High silica content
D) High iron content
  • 30. What are chains of volcanoes near subduction zones called?
A) Lithospheric plates
B) Hotspots
C) Volcanic arcs
D) Mid-ocean ridges
  • 31. What are hotspots thought to be formed by?
A) Mantle plumes
B) Subduction
C) Black smokers
D) Divergent plates
  • 32. Which island group is cited as an example of hotspot volcanism?
A) Japanese archipelago
B) Icelandic ridge
C) Hawaiian Islands
D) Cascade volcanoes
  • 33. Where is the Yellowstone Caldera currently located?
A) Pacific plate
B) North American plate
C) Indonesian plate
D) Icelandic plate
  • 34. What happens to a volcano as a tectonic plate drifts off a mantle plume?
A) It grows larger
B) It erupts more frequently
C) It becomes inactive
D) It moves with the plume
  • 35. What is the current status of the mantle plume hypothesis?
A) It has been proven false
B) It is universally accepted as fact
C) It has been questioned
D) It is no longer studied
  • 36. Where are most volcanoes on Earth found?
A) Underwater
B) In the center of continents
C) On high mountain peaks
D) Near the North and South Poles
  • 37. What type of plate boundary creates the Pacific Ring of Fire?
A) Stable
B) Divergent
C) Transform
D) Convergent
  • 38. Which type of volcanic activity is usually nonexplosive?
A) Hotspot
B) Convergent
C) Divergent
D) Transform
  • 39. What is the Hawaiian hotspot an example of?
A) Intraplate volcanism
B) Convergent subduction
C) Transform faulting
D) Divergent plate boundary
  • 40. How can large volcanic eruptions affect the atmosphere?
A) They remove all oxygen
B) They cool the troposphere
C) They heat the troposphere
D) They increase sunlight penetration
  • 41. What is the etymological origin of the word volcano?
A) The Latin word for mountain
B) A Greek mountain deity
C) An ancient term for fire
D) The Roman god Vulcan
  • 42. What is the study of volcanoes called?
A) Tectonics
B) Geology
C) Seismology
D) Volcanology
  • 43. What does the 2009 definition of a volcano include?
A) Only atmospheric gas releases
B) Only continental volcanoes
C) Cryovolcanism
D) Only molten rock eruptions
  • 44. Which planet is noted as having very numerous volcanoes?
A) Jupiter
B) Saturn
C) Mercury
D) Venus
  • 45. What can develop under the interior of a continent due to sustained upwelling of hot mantle rock?
A) Tectonic folding
B) Rifting
C) Subduction
D) Oceanic trenches
  • 46. What is an early stage of continental rifting characterized by?
A) Mountain building
B) Flood basalts
C) Tidal waves
D) Deep ocean trenches
  • 47. What is a failed rift called?
A) Fissure vent
B) Cryovolcano
C) Shield volcano
D) Aulacogen
  • 48. Which location is mentioned as an example of an East African Rift volcano?
A) Lake Taupō
B) Kīlauea
C) East African Rift
D) Olympus Mons
  • 49. What allows magma to rise through the crust?
A) A plateau
B) A conduit
C) A crater
D) A fissure
  • 50. What is Puʻu ʻŌʻō an example of?
A) A cryovolcano
B) A summit crater
C) A massive plateau
D) A smaller cone on a flank
  • 51. What kind of volcanic activity do mud volcanoes often NOT involve?
A) Magmatic activity
B) Low temperatures
C) Surface gas emission
D) Vent activity
  • 52. What is the primary characteristic of a fissure vent eruption?
A) Non-explosive
B) Highly explosive
C) High viscosity
D) Catastrophic
  • 53. Which of these is the largest known volcano in the Solar System?
A) Puʻu ʻŌʻō
B) Lake Taupō
C) Olympus Mons
D) Kīlauea
  • 54. What is another name for lava domes?
A) Shield volcanoes
B) Cinder cones
C) Dome volcanoes
D) Composite volcanoes
  • 55. Which mountain is cited as an example of a lava dome formed within a previous crater?
A) Mount Fuji
B) Mount St. Helens
C) Lassen Peak
D) Parícutin
  • 56. What is the typical height range of a cinder cone?
A) 1,000 to 5,000 metres
B) 30 to 400 metres
C) 500 to 1,000 metres
D) 5 to 10 metres
  • 57. What is another name for stratovolcanoes?
A) Dome volcanoes
B) Maar craters
C) Cryptodomes
D) Composite volcanoes
  • 58. What is the typical slope angle of a stratovolcano?
A) 10–20°
B) 30–35°
C) 45–60°
D) 5–10°
  • 59. Which city was destroyed by a pyroclastic surge in 1902?
A) Saint-Pierre
B) Naples
C) Tokyo
D) Mexico City
  • 60. Where do subglacial volcanoes develop?
A) At the bottom of deep oceans
B) Inside tectonic plates
C) On oceanic ridges
D) Underneath ice caps
  • 61. What is another name for subglacial volcanoes?
A) Shield volcanoes
B) Cinder cones
C) Stratovolcanoes
D) Tuyas
  • 62. Where does the term 'tuya' originate from?
A) Tuya Glacier
B) Tuya Island
C) Tuya Valley
D) Tuya Butte
  • 63. Where are the Tuya Mountains located?
A) Northern British Columbia
B) Central Yukon
C) Southern Alberta
D) Western Ontario
  • 64. What are fumaroles erupting sulfurous gases called?
A) Solfataras
B) Mud pools
C) Hot springs
D) Geysers
  • 65. What substance is primarily found in volcanic gases?
A) Molten rock
B) Liquid mud
C) Steam
D) Solid tephra
  • 66. What are solid particles ejected through the air during an eruption called?
A) Slurry
B) Tephra
C) Palagonite
D) Pillow lava
  • 67. What causes the pressure to build up in geysers?
A) Surface water weight
B) Tectonic shifting
C) Magmatic gases
D) Steam pressure
  • 68. Which of these is an example of a volcano formed from felsic lava?
A) Mauna Loa
B) Novarupta
C) Lassen Peak
D) Kilauea
  • 69. What is the common name for pyroclastic flow deposits?
A) Tuff
B) Ignimbrites
C) Basalt
D) Obsidian
  • 70. What is the approximate maximum temperature of pyroclastic flows?
A) 1,200 °C
B) 850 °C
C) 500 °C
D) 100 °C
  • 71. Intermediate magma is characterized by what silica percentage range?
A) Less than 45%
B) 52–63%
C) Greater than 63%
D) 45–52%
  • 72. Which volcanoes are most commonly associated with intermediate magmas?
A) Lava domes
B) Shield volcanoes
C) Stratovolcanoes
D) Flood basalts
  • 73. Which surface texture of mafic lava is described as rough and clinkery?
A) Obsidian
B) Pāhoehoe
C) Block lava
D) ʻAʻa
  • 74. What is the correct term for lava containing 45% or less silica?
A) Ultramafic
B) Felsic
C) Intermediate
D) Basaltic
  • 75. What is the common name for ultramafic flows?
A) Ignimbrites
B) Dacites
C) Rhyolites
D) Komatiites
  • 76. Rhyolitic flows consist largely of which material?
A) Basalt
B) Obsidian
C) Tuff
D) Pāhoehoe
  • 77. What is the maximum diameter of particles classified as volcanic ash?
A) 10 mm
B) 1 mm
C) 2 mm
D) 5 mm
  • 78. What term refers to shattered volcanic material?
A) Magma deposits
B) Sedimentary rock
C) Lava flows
D) Volcaniclastics
  • 79. What process is described as the erosion of a volcano's mantle to reveal its inner anatomy?
A) Dissection
B) Crystallization
C) Effusion
D) Decompression
  • 80. What is the primary factor that forms a resistant plug in an extinct volcano?
A) Erosion
B) Tectonic uplift
C) Pressure buildup
D) Magmatic flow
  • 81. Which location is cited as a famous example of an exposed volcanic plug?
A) Devils Tower
B) Cinder Hill
C) Mount Vesuvius
D) Mount Kaimon
  • 82. According to the Smithsonian Institution, how many confirmed eruptions occurred in the Holocene Epoch as of August 2026?
A) 1,113
B) 168
C) 1,214
D) 10,652
  • 83. What type of eruption is associated with a VEI of 0?
A) Vulcanian
B) Ultra-Plinian
C) Hawaiian-type
D) Plinian
  • 84. What is the primary product of Strombolian eruptions?
A) Rhyolitic lava
B) Country rock
C) Scoria
D) Pumice
  • 85. Which eruption type features the destruction and rebuilding of a central dome?
A) Plinian
B) Hawaiian
C) Vulcanian
D) Phreatic
  • 86. Which eruption type is associated with dome growth and collapse producing pyroclastic flows?
A) Peléan
B) Ultra-Plinian
C) Strombolian
D) Hawaiian
  • 87. Who chronicled the Plinian eruption of 79 AD?
A) The Smithsonian Institution
B) Vulcano
C) Pliny the Younger
D) Pliny the Elder
  • 88. What is the largest and most intense type of volcanic eruption mentioned?
A) Vulcanian
B) Ultra-Plinian
C) Strombolian
D) Peléan
  • 89. Which feature of Mount Bird is an example of a dissected volcano?
A) Mount Kaimon
B) Cinder Hill
C) Mount Pelée
D) Devils Tower
  • 90. Which of the following terms is used to informally describe a volcano?
A) Volatile
B) Saturated
C) Dormant
D) Submerged
  • 91. Are the definitions for volcanic activity terms uniform among volcanologists?
A) Only for extinct volcanoes
B) Only for active volcanoes
C) No
D) Yes
  • 92. How does the activity level of most volcanoes appear?
A) As a graduated spectrum
B) As a three-step process
C) As a random variable
D) As a fixed binary state
  • 93. Do volcanic activity categories overlap?
A) Only for extinct volcanoes
B) Only for erupting volcanoes
C) Yes
D) No
  • 94. Which term is listed in the text as a way to describe a volcano?
A) Extinct
B) Explosive
C) Composite
D) Shielded
  • 95. What is the status of definitions for erupting, active, dormant, and extinct volcanoes?
A) Universally agreed upon
B) Not entirely uniform
C) Strictly standardized
D) Legally defined globally
  • 96. What is considered a sign of volcanic unrest according to the USGS?
A) Increased vegetation growth.
B) Cooling surface temperatures.
C) Decreased volcanic gas emissions.
D) Ground inflation.
  • 97. Which volcano erupted unexpectedly in 2008, challenging old definitions?
A) Mount Edgecumbe.
B) Pinatubo.
C) Chaitén.
D) Taftan.
  • 98. What does long-term volcano dormancy often lead to?
A) Better disaster preparation.
B) Government funding for research.
C) Decreased awareness.
D) Increased seismic monitoring.
  • 99. Which volcano was not initially seismically monitored before its 1991 eruption?
A) Pinatubo.
B) Yellowstone.
C) Soufrière Hills.
D) Taftan.
  • 100. Before its 2006 eruption, when did Fourpeaked Mountain last erupt?
A) In 1995.
B) Before 8000 BCE.
C) In 1991.
D) In 79 CE.
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