1) Which type of volcanic eruption is driven solely by steam and involves no magma? a) Phreatic b) Strombolian c) Vulcanian 2) What is a distinct feature of Plinian eruptions? a) Rhythmic bursts of lava and gas b) Extremely high ash columns reaching the stratosphere c) Short and violent explosions of ash and gas 3) Which eruption type has mild, rhythmic lava fountains and small pyroclastic emissions? a) Phreatomagmatic b) Strombolian c) Vulcanian 4) What causes Phreatomagmatic eruptions? a) Interaction between water and magma b) Release of gas from molten rock c) Sudden collapse of a magma chamber 5) Which eruption type is associated with tall ash columns and pyroclastic flows, preceded by loud explosions? a) Vulcanian b) Strombolian c) Phreatic 6) Which eruption type is known for producing base surges and fine ash due to water and magma interaction? a) Phreatomagmatic b) Plinian c) Phreatic 7) Which Philippine volcano is associated with a famous Plinian eruption in 1991? a) Mount Mayon b) Mount Pinatubo c) Mount Bulusan 8) What level of destruction is typical for Strombolian eruptions? a) Low to moderate, localized to the volcano's vicinity b) High, with widespread devastation c) Moderate to high, with pyroclastic surges 9) Which type of eruption can produce volcanic winter due to its global ash dispersal? a) Phreatic b) Plinian c) Vulcanian 10) Which Philippine volcano is known for Vulcanian eruptions and has caused pyroclastic flows in the past? a) Mount Kanlaon b) Mount Hibok-Hibok c) Mount Apo

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