Although it is difficult to get a precise number of active volcanoes, a common estimate is about ____.
A) 100
B) 250
C) 550
D) 1100
E) 2000
Correct Answer:
Verified
Q12: In 1986, in Cameroon, many people died
Q13: After a volcano erupts, the frequency of
Q14: Columnar jointing in lava flows occurs due
Q15: Not all volcanism results in the origin
Q16: Pillow lava forms when _.
A)lava is rapidly
Q18: A nuée ardente is composed of fiery
Q19: The dominant gas emitted from volcanoes is
Q20: Earth is the most volcanically active body
Q21: Calderas are formed when _.
A)low-viscosity magma flows
Q22: What are the criteria used by geologists
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