question: Students have a rock sample that may contain the mineral hematite. They know that hematite has a red or rusty streak. How can the students determine the color of the streak in the rock sample?
choices.text: use a rock with the known mineral to strike the sample rub the sample on a piece of unglazed clay tile use a file to break off a piece of the sample scratch the sample with an iron nail
choices.label: A B C D