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The reason for an opals characteristic flash is because the sphere of silica are mixed with a small amount of what ? A.) Magma B.) Hydrogen C.) Methane D.) Water

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Answer:Silica content influences magma behavior-____magmas have high silica content, are viscous (thick), and erupt at a lower temperature-____magmas have much lower silica content, more fluidlike behavior, and erupt at a higher temperature

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