Gravitational filtration is a process that uses gravity to separate a mixture of substances based on their size and weight. This method is commonly used in industry and research to purify liquids and solids, such as in water treatment plants or laboratories. In gravitational filtration, the mixture is poured into a container with a filter medium, which allows smaller particles to pass through while retaining larger particles. The filter medium can be made of various materials, such as sand, paper, or cloth, depending on the application. The force of gravity pulls the liquid or solid through the filter medium, leaving behind the unwanted particles. The filtered substance can then be collected and used for its intended purpose.