To the mixture of sand and salt in a beaker add water. The salt will dissolve in water and sand will remain undissolved. Now keep this beaker for some time. The sand will settle down at the bottom of the container(sedimentation). The sand can be separated by gently pouring the liquid without disturbing the sand (decantation) and filtration. Decantation is the process of transferring a liquid from one container to another without disturbing the sediments that are present at its bottom while filtration is the process of separating a mixture by passing the it through a material containing fine holes that will allow only one component of the mixture to pass through. This decanted liquid contains salt dissolved in it. Take the solution in a kettle and heat the kettle. Water will be converted into steam. When a metal plate with ice over it is placed above the spout of the kettle, the steam coming out of the kettle comes in contact with the plate and is condensed to water. Hence a mixture of sand and salt can be separated by sedimentation, decantation, filtration, evaporation and condensation.