All of the following statements concerning magma movement are true EXCEPT:
A) a highly viscous magma usually crystallizes at lower temperatures.
B) the gases in low- viscosity magmas tend to escape easily when the magma reaches the surface.
C) as heat reduces viscosity, ions within a magma move more rapidly.
D) a very viscous magma tends to be less explosive.
Correct Answer:
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Q8: All of the following events could indicate
Q9: A volcanic dome forms when:
A) faulting causes
Q10: The force that causes pyroclastic volcanoes to
Q11: Felsic magmas with high water and gas
Q12: If a volcano has not erupted in
Q14: A lahar can best be described as
Q15: Which of the following is a likely
Q16: Which of the following statements regarding volcanoes
Q17: An active volcano is any volcano that:
A)
Q18: Pyroclastic eruptions are likely to occur in
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