to make a solution of, as by mixing with a liquid; pass into solution: to dissolve salt in water. to melt; liquefy: to dissolve sugar into syrup. to undo (a tie or bond); break up (a connection, union, etc.). to break up (an assembly or organization); dismiss; disperse.
The Mohs scale of mineral hardness is based on the ability of one natural sample of mineral to scratch another mineral visibly. The samples of matter used by Mohs are all different minerals. Minerals are pure substances found in nature. Rocks are made up of one or more minerals.
The Basics About the Rockwell Hardness Test. Simply put, the Rockwell hardness test is a method of measuring the hardness of materials. The Rockwell hardness scale is typically administered to characterize the hardness of metals, such as thin steel, cemented carbides, lead, aluminum, zinc, copper alloys, titanium and iron.