Attrition – Rocks being carried by the river smash together and break into smaller, smoother and rounder particles

Attrition – think BUMP

A trick with attraction (attrition) is to make sure you bump into the person you are attracted to.

Attrition is where particles and small rocks transported downstream strike each other, and the riverbed, causing them to be broken into smaller fragments and rounding their edges. Attrition is one of the forms of erosion that makes pebbles so smooth and rounded.