Sieving materials is a process used to separate different sizes of particles in a mixture. This technique is commonly applied in various industries, such as construction and food processing, to ensure that the materials meet specific size requirements. A sieve, which is a device with a mesh or perforated surface, allows smaller particles to pass through while retaining larger ones. The process of sieving can help improve the quality of products by removing unwanted debris or ensuring uniformity in particle size. For example, in the production of flour, sieving helps eliminate lumps and ensures a fine texture. This method is also essential in laboratory settings for analyzing soil or other granular materials.