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Asked by Tony

Number the items to show the most effective and the least effective to use to scratch the mineral to test its hardness. Use number 1 for the most effective and the 4 for the least efective.

Chalk(1)
Fingernail(2)
Steel screw(4)
Paper clip(3)

Am I correct????
12 years ago

Answers

Answered by PsyDAG
Reverse the order. #1 is the <I>most</I> effective to scratch.
12 years ago
Answered by PsyDAG
Also, indicate your subject in the "School Subject" box, so those with expertise in the area will respond to the question.
12 years ago

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