Solid brick - An impermeable material, Sediment - A general word that describes materials that are permeable, Permeable - A word that describes how easily water flows through a material., Porosity - A measurement of the pore space in a material., Water filter - A device that helps to clean water to make it drinkable., Layers - How materials are organized inside a water filter., Gravel - Material that water easily passes through, Sand - Material that holds water well, Aquifer - An area where water is stored underground., Saturated - A word that describes when a material can not hold any more water.,

Permeability

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