Why Does the Magma from Some Volcanoes Flow Smoothly and Relatively

question 2

Multiple Choice

Why does the magma from some volcanoes flow smoothly and relatively peacefully,while the magma from other volcanoes blasts forth violently and deals death over wide areas?

• A)differences in the chemical and mineral makeup of magmas
• B)variations in the temperature,water and gas content,and viscosity of magmas
• C)different geographic positions with respect to hot spots and edges of tectonic plates
• D)All of these are correct.

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An abbreviation for the Latin phrase "pro re nata," meaning "as needed," often used in medical prescriptions.

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The process whereby a patient or their legal representative receives an explanation of and consents to a medical procedure or participation in a research study, acknowledging understanding of the risks and benefits.

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