Question

what particle size category falls between sand and clay? peat silt gravel

Explanation:

Soil particle size categories are defined by specific size ranges. Sand has larger particles (0.05 - 2 mm), silt has intermediate - sized particles (0.002 - 0.05 mm), and clay has very fine particles (<0.002 mm). Peat is an organic soil material, not a particle - size category. Gravel has larger particles (>2 mm) than sand.

Answer:

silt