Magnetic+Minerals+in+Rocks

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A student finds a dull black rock. She puts a magnet next to it, and the magnet is not attracted to the rock. Which of the following statements best describes the rock?

B. Iron is definitely present in the rock because black rocks contain iron C. No metals are present in the rock because metals are magnetic D. Iron is not present in the rock because red rocks contain iron E. No metals are present in the rock because shiny rocks contain metal
 * A. Iron could be present in the rock because some black rocks contain iron **

**bold** = correct answer

Question Identifier: GCI_2011_083 Designed for: //Non-Science Majors// Primary Author(s): //J. Libarkin and E.M. Geraghty Ward// Contributing Author(s): Misconception's Reference: //Original GCI (https://www.msu.edu/~libarkin/GCI_PUBLICATIONS.html)// Notes: //Gender bias suggested by dif analysis on GCI v.1.0.//

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