Two unknown minerals are placed before you for identification. You decide to test each mineral's hardness. Mineral A will scratch a piece of glass. Mineral B will not. Which mineral is harder? How do they compare to the specific hardness of the glass?
What will be an ideal response?
Answer: Mineral A is harder. Specifically, it is harder than glass (5.5) because it made a scratch. Mineral B is softer than 5.5 because it did not scratch the glass.
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