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Volcanic ash: Quiz

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Question 1: The usually violent nature of an eruption involving steam (phreatic eruption or ________) results in the magma and solid rock surrounding the vent being torn into particles of clay to sand size.
IgnimbritePhreatomagmatic eruptionVolcanoCaldera

Question 2: After the Galunggung, ________ volcanic event in 1982, a British Airways Boeing 747 flew through an ash cloud that fouled all 4 engines, stopping them.
SingaporePhilippinesIndonesiaMalaysia

Question 3: People who wear contact lenses should wear ________ during an ashfall, to prevent eye damage.
Lens (optics)OpticsSunglassesGlasses

Question 4: [2] The violent nature of volcanic eruptions involving steam results in the magma and solid rock surrounding the vent being torn into particles of ________ to sand size.
EarthquakeSoilSoil liquefactionClay

Question 5: Ashfall can also become cemented together to form a solid rock called ________.
TuffTrachyteIgnimbriteBasalt

Question 6: What does the following picture show?

  1875 Icelandic eruption event spreads its ashes to Scandinavia in 48 hours.
  Satellite image of the area around Karymsky. Ash from earlier eruptions has settled onto the snowy landscape, leaving dark grey swaths. The ash stains are confined to the south of the volcano’s summit, one large stain fanning out toward the south-west, and another toward the east.
  Daytime Montserrat image during ash fall (1997)
  Light microscope image of ash from the 1980 eruption of Mount St. Helens, Washington.

Question 7: Unlike the ash that forms from burning wood or other ________ materials, volcanic ash is hard and abrasive.
CombustionFireOxygenInternal combustion engine

Question 8: What does the following picture show?

  Light microscope image of ash from the 1980 eruption of Mount St. Helens, Washington.
  Ash plume from Mt Cleveland, a stratovolcano.
  Daytime Montserrat image during ash fall (1997)
  Particle of volcanic ash from Mount St. Helens.

Question 9: Volcanic ash (by itself) is not poisonous, but inhaling it may cause problems for people whose respiratory system is already compromised by disorders such as ________ or emphysema.
Farmer's lungAsthmaHypersensitivity pneumonitisAllergic bronchopulmonary aspergillosis

Question 10: This poses a great danger to ________ flying near ash clouds.
AircraftDouble-deck aircraftWide-body aircraftBusiness jet







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