Mixtures are combinations of two or more substances that are not chemically bonded and retain their individual properties. Separating mixtures into their components is important in daily life and industries. The method of separation depends on the physical properties of the substances involved. Handpicking is used for large, visible impurities. Threshing separates grains from stalks. Winnowing separates lighter particles like chaff from heavier grains using wind. This Sorting and Separation of Materials Quiz for Grade 8 examines various separation techniques and their practical applications. Sieving separates particles of different sizes. Sedimentation and decantation separate insoluble solids from liquids. Filtration is used for finer particles that do not settle quickly. Evaporation recovers dissolved solids from solutions. Distillation separates liquids with different boiling points. Chromatography separates dissolved substances. Learning about separation techniques helps students understand practical chemistry and develop analytical and problem-solving skills. Take these 10 questions to test your knowledge.
