Anna collected several samples of a mineral that she believed were calcite. she also collected samples of quartz, talc, and gypsum. which one property of calcite could she use to identify her samples as calcite rather than another mineral?

a. streak color
b. sample color
c. surface luster
d. acid reaction

2. cheryl hears a new song on the radio every day during the week on her commute to work. surprisingly, when the song comes on at a party on saturday night, she knows most of the words without trying. describe the three ways that we use cognition to learn without reinforcement. which type of cognitive learning without reinforcement best explains how cheryl knew the song lyrics? explain your answer.