Volcanologists can often tell an eruption is eminent because of changes in .
A) seismic activity
B) gas emissions
C) ground and water temperatures
D) the slope of a volcano's flanks
E) All of the previous
Correct Answer:
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Q18: Large,loose pyroclasts welded together during an eruption
Q19: According to the figure below,the temperature of
Q20: The figure below is an igneous rock
Q21: A volcanic pipe is a remnant of
Q22: Igneous rocks high in feldspars and silicates
Q24: The presence of higher amounts of water
Q25: Mt.St.Helen's erupted on May 18,1980 and blanketed
Q26: When magma re-enters a magma chamber causing
Q27: According to the figure below,an increase in
Q28: In the figure below,albite crystals will melt
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