Grain size analysis is a method used to determine the size distribution of particles in a material, often in sediments or soils. This analysis helps scientists understand the physical properties of the material, such as its permeability and stability. Techniques like sieving or laser diffraction are commonly employed to measure the sizes of grains, which can range from clay to gravel. The results of grain size analysis are crucial in various fields, including geology, environmental science, and engineering. By knowing the grain size, researchers can make informed decisions about land use, construction projects, and natural resource management.