Question

the mohs scale of mineral hardness is a ten - point scale that orders minerals by hardness based on their ability to scratch other minerals. minerals with larger numbers are harder than minerals with smaller numbers and can leave visible scratches on them. minerals with smaller numbers are softer than minerals with larger numbers and cannot leave visible scratches on them. the mineral apatite has a mohs scale number of 5. the mineral quartz has a mohs scale number of 7. the mineral diamond has a mohs scale number of 10. the student wants to emphasize quartzs mohs scale number. which choice most effectively uses relevant information from the notes to accomplish this goal? a. quartz, apatite, and diamond can be ordered by their ability to leave visible scratches on other minerals. b. diamond, which has a mohs scale number of 10, can scratch both apatite and quartz. c. quartz has a mohs scale number of 7, which means that it is harder than apatite (5) but softer than diamond (10). d. in the mohs scale of mineral hardness, diamond (10) is ranked higher than apatite (5).

Explanation:

The goal is to emphasize quartz's Mohs scale number. Option C directly states quartz's number (7) and compares it to the numbers of other minerals (apatite and diamond), effectively highlighting its value. Options A and D do not focus on quartz's number specifically. Option B only mentions diamond's ability to scratch other minerals without emphasizing quartz's number.

Answer:

C. Quartz has a Mohs scale number of 7, which means that it is harder than apatite (5) but softer than diamond (10).