Why Does Silica Content in Most Magmas Range from 45

question 47

Multiple Choice

Why does Silica content in most magmas range from 45 to almost 80 percent by weight?

• A) Silica is very heavy and therefore throws off the percent weight.
• B) Silica is made up of silicon and oxygen, two elements most prevalent in the earth's crust.
• C) Silica is a very heavy gas.
• D) Silica is extremely light.

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