This document discusses various methods of separating substances, including hand picking, threshing, winnowing, sieving, sedimentation and decantation, filtration, and evaporation. Hand picking separates large impurities while sieving separates components by size as smaller particles pass through sieve pores. Sedimentation separates heavier components that settle while decantation removes liquid layers to separate solids or immiscible liquids. Filtration uses filter paper to separate solids from liquids and evaporation heats liquids to change them into gases and separate dissolved substances.