question: Measuring the hardness of calcite requires what?
choices.text: melting those materials hardened backbone amount of heat 70-75 degrees Fahrenheit cutting those materials scratching yourself thermal expansion scratching those materials
choices.label: A B C D E F G H
fact2: Calcite is a very common mineral.
combinedfact: Measuring the hardness of calcite requires scratching those materials
formatted_question: Measuring the hardness of calcite requires what? (A) melting those materials (B) hardened backbone (C) amount of heat (D) 70-75 degrees Fahrenheit (E) cutting those materials (F) scratching yourself (G) thermal expansion (H) scratching those materials