Methods of Separation
Filtration: For separating an insoluble solid from a liquid, or a soluble solid from an insoluble one.
Sand can be separated from water by pouring the mixture down a funnel with filter paper. The sand will collect at the filter paper.
It can also be used to separate sand from something like salt by dissolving salt in water (which leaves you with sand mixed with salt water). The mixture can then be poured down a funnel. The sand that collects at the top should can be rinsed and dried. The water can be evaporated from the salt by heating with a Bunsen burner.