What is the characteristic of a mineral? a. it must be amorphous and have an indefinite chemical composition. b. it must be crystalline and have a definite chemical composition. c. it must be amorphous and have a definite chemical composition.(btw this is science i could not find science) d. it must be crystalline and have an indefinite chemical composition.

Match the item to the definition: indirect correlation, correlational research, correlational research, covary, pearson correlation coefficient, pearson correlation coefficient, direct correlation a. used to describe the relationship between two or more naturally occurring variables b. determines whether scores on the two variables covary c. whether two variables vary or change together d. denoted by the symbol "r" e. provides information about the sign (direction) and magnitude(strength) of the linear relationship. f. when the correlation is positiveg. when the correlation is negative