Strategies for stopping an advancing lava flow include all of the following except
A) Spraying water on the flow front to cool it.
B) Constructing a dense, massive plug to stop up the vent from which the magma is erupting.
C) Using explosives to punch holes selectively in a flow's hardened crust to divert remaining liquid lava.
D) All of these are strategies for stopping an advancing lava flow.
Correct Answer:
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Q7: A volcanic landform built of entirely of
Q8: A volcano built of many thin flows
Q9: A phreatic volcanic eruption
A) Involves ash only.
B)
Q10: Fast moving volcanic mudflow is formed as
Q11: In contrast to the mafic volcanism at
Q13: The low-viscosity,fluid lava of hot-spot volcanoes is
Q14: The 1883 Krakatoa,Indonesia eruption is more accurately
Q15: Volcanic ash
A) Is composed of microscopic shards
Q16: The Pacific Ring of Fire is
A) A
Q17: A hot,glowing cloud of gas and ash
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