Soil Formation and Erosion Practice Test

A field is left bare between harvest and planting. Winter rains cause widespread, uniform removal of a thin layer of soil without forming channels. What type of erosion is most consistent with this description?

Two soils have identical climate, organisms, and time. Soil 1 forms on granite; Soil 2 forms on shale. Soil 2 develops finer texture faster. Which soil-forming factor best explains the difference?