Why is a beaker containing sand and water considered mixture?

A beaker containing sand and water is considered a mixture because it contains two or more substances that are not chemically combined. The sand and water are physically mixed together, but they can be easily separated by filtration or decantation.

A mixture is a combination of two or more substances that are not chemically combined. The substances in a mixture retain their own chemical properties and can be separated by physical means. Mixtures can be homogeneous or heterogeneous. Homogeneous mixtures have the same composition throughout, while heterogeneous mixtures have different compositions in different parts.

Sand and water is a heterogeneous mixture because the sand and water are not evenly distributed throughout the mixture. The sand particles are heavier than the water molecules, so they settle to the bottom of the beaker. The water is on top of the sand.

Mixtures can be separated by physical means such as filtration, decantation, or distillation. Filtration is a process of separating solids from liquids using a filter. Decantation is a process of separating liquids from solids by pouring off the liquid. Distillation is a process of separating liquids from liquids by heating the mixture until the liquids vaporize and then condensing the vapors.

Sand and water can be separated by filtration. The sand particles will be trapped on the filter paper, and the water will pass through the filter paper. The water can then be separated from the sand by decantation.