Hi!
The portion of the rock cycle that Quinn was modeling by cut the taffy into small pieces with scissors was the Weathering, where rock pieces are broken into tiny sediments.
Weathering is a part of the Rock Cycle that doesn't involve movement and consists in the breaking down of minerals and rocks when they enter into contact with the atmosphere, hydrosphere or biosphere. Weathering can be Physical, Chemical or Biological, according to the mechanism of the rupture of the rock.
The complete Rock Cycle describes how Rocks can be transformed into Sedimentary, Igneous or Metamorphic Rocks.
Have a nice day!
