What type of eruption formed the volcano in this photograph?
A. fluid lava flows
B. eruptions beneath the seafloor
C. lava fountains
D. fissure eruptions
E. viscous lava and pyroclastic eruptions
Answer: E
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A mineral that is not a silicate is
A) feldspar. B) mica. C) calcite. D) quartz.
An oval fold in which strata are up-arched and the younger rocks are found in the interior is a basin. Indicate whether the statement is true or false
Which option best describes the direction of the eruption of Mount St. Helens and the cause of this action, according to Figure 15.24 in your textbook?
A) Magma pressure built up and caused a vertical eruption of magma and ash. B) A rock slide released pressure on the magma, causing a horizontal eruption. C) An earthquake sheared off part of the mountain, causing a horizontal eruption. D) An earthquake opened a vent in the top of the mountain, releasing pressure on the magma and causing a vertical eruption.
Which of the following alcohols could be the alcohol portion of a wax?
A) ethylene glycol, C2H4(OH)2 B) glycerol, C3H5(OH)3 C) 1-triacontanol, C30H61OH D) none of these