Oxygen and silicon are so abundant in the Earth's crust that their percentages dwarf those of all other elements.
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Q26: Gas bubbles decrease in number and volume
Q27: On 20 February 1943,a new volcano,a scoria
Q28: Water circulating at thousands of feet
Q29: What is the cause of volcanism at
Q30: _ in the Aegean Sea underwent an
Q32: A caldera collapse occurs _.
A)before the eruption
Q33: _ are steep-sided,symmetrical volcanic peaks built of
Q34: This volcano erupted in 1883 in the
Q35: Magma at depth does not contain gas
Q36: Most magma is generated by decreasing the
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