Minerals Are Grouped into Mineral Classes Primarily on the Basis

question 43

Multiple Choice

Minerals are grouped into mineral classes primarily on the basis of

• A) chemistry,specifically the cations within the chemical formula.
• B) chemistry,specifically the anions within the chemical formula.
• C) hardness; hard,soft,and medium are the three primary classes.
• D) the number of cleavage directions present.

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Definitions:

Independent Variable

A variable that is manipulated or changed in an experiment to test its effects on a dependent variable.

Dependent Variable

The variable in an experiment that is expected to change in response to changes in the independent variable.

Slope

The measure of the steepness, incline, or grade of a straight line, reflecting the ratio of the vertical change to the horizontal change between two points on the line.

Y-Intercept

The point where a line crosses the Y-axis of a graph, indicating the value of the response variable when all predictor variables are zero.