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.

---

Definitions:

API Gravity

A measure of how heavy or light a petroleum liquid is compared to water, used in the oil industry.

Regression Line

A line through a scatterplot of data points that best expresses the relationship between those points, often used in predicting outcomes.

Oil Quality

A measure or evaluation of the physical and chemical properties of oil, determining its suitability for specific uses or processes.

Simple Linear Regression

A statistical method to model the relationship between two variables by fitting a linear equation to observed data where one variable is considered an independent variable and the other an dependent variable.