Mastication, known in common vernacular as chewing. (Mechanical digestion)
The process of dissolving by breaking into smaller pieces is called dissolution. This is the process through which a solute makes a solution by breaking the solvent.
weathering
Weathering.
Weathering
It is actually called weathering, but if your talking about the process of rocks breaking down into smaller pieces by physical means it is called Mechanical Weathering, by chemical means it is called Chemical Weathering.
The process of the breakdown of rocks into smaller pieces by physical means is called mechanical weathering.
That process is called the Digestion Process.
Abrasion. (~the process of scraping or wearing away)
That would be mechanical weathering
segmentation
The process of breaking down food is called digestion.
In reference to glaciers or icebergs,when smaller pieces break off and fall away,it is called "calving", as though the parent ice formation were having a calf.