Over _________ of Earth's magma extruded through volcanism takes place at the oceanic spreading centers.
A) 90%
B) 80%
C) 70%
D) 60%
E) 50%
Correct Answer:
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Q8: If basaltic lava reaches the sea or
Q9: The volcanic explosivity index (VEI)measures size of
Q10: Slow flowing,more viscous basaltic lava commonly has
Q11: Silicon and oxygen link up to form
Q12: Hawaiian volcanoes unlikely to erupt include _.
A)Haleakala
Q14: The dominant volcanic gas (commonly 90% or
Q15: Why does the magma from some volcanoes
Q16: A shield volcano has a great _.
A)height
Q17: Over _ of volcanism is associated with
Q18: The three Vs of volcanology are _.
A)viscosity,volatiles,velocity
B)viscosity,volatiles,volume
C)viscosity,velocity,volume
D)volatiles,volume,variability
E)volatiles,velocity,variability
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