What is the unit of increase on the Mohs Relative Hardness Scale?

A) An increase of one unit indicates the rock is twice as hard as the one before.
B) An increase of one unit indicates the rock is seven times as hard as the one before.
C) An increase of one unit indicates the rock is ten times as hard as the one before.
D) The scale is variable.


Answer: D

Environmental & Atmospheric Sciences

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