Differences in which property allows the separation of a sample of sand and sea water by filteration

            Differences in Particle Size allows the separation of a sample of sand and sea water by filtration.

Explanation:
                     This is a very simple example which can be conducted at home. When Salt dissolved in water is filtered all the solution get passed through filter paper, while solution of sand and water on filtration separates the sand from water. This is because of the particle size. The size of Na⁺ and Cl⁻ ions are very small and can easily pass through the pores of filter paper, while the size of sand particles are very large and fails to pass through the pores of filter paper.

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