Silicon and oxygen link up to form the silicon-oxygen ________________.
A) dihedron
B) trihedron
C) tetrahedron
D) hexahedron
Correct Answer:
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Q4: Spreading centres are an ideal location for
Q5: Slow flowing,more viscous lava commonly has a
Q6: The presence of water _ the melting
Q7: Why does the magma from some volcanoes
Q9: The volcanic explosivity index (VEI)measures size of
Q10: Rock may melt by _.
A) lowering the
Q12: In magma the most abundant dissolved gas
Q13: Volcanic material which has a lower density
Q14: The dominant volcanic gas (commonly 90% or
Q16: A shield volcano has a great _.
A)height
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