What is filtering used for?, Mixing substances, Separating a solid from a liquid, What passes through the filter paper?, Liquid, Solid, What stays on the filter paper?, Insoluble solids, Water, Can filtering separate salt from salt water?, Yes, No, Why does water pass through the filter?, Because its particles are small, Because it is heavy, What happens when you filter sand and water?, Sand passes through, Sand stays on the filter, What is the first step to separate sand and salt?, Add water, Heat the mixture, Why does salt pass through the filter with water?, It dissolves into very small particles, It is heavier than sand, What is the final step to get salt after filtering?, Add more sand, Evaporate the water, Why do tea leaves stay inside a teabag?, They are too big to pass through, They dissolve in water.

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