What are the three major classifications of magma? How are they defined? What elements increase or decrease in the composition of the three types?

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The Answer is Felsic magma has more than 65% silica,mafic magma is less than 52% silica,and intermediate magma falls in between.Sodium,potassium,and aluminum are higher in the more silica-rich magmas.Calcium,iron,and magnesium are lower in the more silica-rich magmas.

What Are the Three Major Classifications of Magma? How Are