Although it has nothing to do with biology, electroresistance analyzers, such as the Coulter counter, canbe used to determine this property. The thickness of a capillary fringe is inversely proportional to fluidweight density and this property. This property can be expressed in phi units, a negative base-two logarithmscale, which simplifies its depiction on the Wentworth scale. The distribution of this property determineswhether a certain thing is poorly-graded or well-graded. The Casagrande classification system was basedprimarily on this property and was modified to create the Unified Soil Classification System. For 10 points,identify this 
Although it has nothing to do with biology, electroresistance analyzers, such as the Coulter counter, canbe used to determine this property. The thickness of a capillary fringe is inversely proportional to fluidweight density and this property. This property can be expressed in phi units, a negative base-two logarithmscale, which simplifies its depiction on the Wentworth scale. The distribution of this property determineswhether a certain thing is poorly-graded or well-graded. The Casagrande classification system was basedprimarily on this property and was modified to create the Unified Soil Classification System. For 10 points,identify this property of soil particles that can be roughly determined by passing them through successivelysmaller sieves.
Although it has nothing to do with biology, electroresistance analyzers, such as the Coulter counter, canbe used to determine this property.
particle size [or grain size; or sediment size; or obvious equivalents, such as particle diameter or particle radius]