Porosity

Porosity refers to the amount of empty space or tiny holes within a material, such as soil, rock, or a sponge. It's expressed as a percentage of the total volume that is occupied by these voids. High porosity indicates more space for fluids like water or air to occupy, which affects properties like drainage, strength, and insulation. For example, a sponge has high porosity because it can hold a lot of water, while a solid metal has very low porosity. Understanding porosity helps in fields like construction, geology, and environmental science to assess material behavior and suitability for specific purposes.