A mineral's hardness is determined by the number and the strength of chemical bonds, but how is it actually determined?
A) by weighing it on a Mohs scale.
B) by whether or not it cleaves.
C) by looking at its streak.
D) by its resistance to scratching or abrasion by other materials of known hardness.

Question

Quizplus · Accepted Answer

The hardness of a mineral is determined by its resistance to scratching or abrasion by other materials of known hardness, which is the principle behind the Mohs scale of mineral hardness.

A Mineral's Hardness Is Determined by the Number and the Strength