Porous

Porous refers to the quality of a material that is filled with tiny holes or pores. These pores may be filled with air, water, or other substances. Porous materials include things like sponge, wood, and even human skin. The term is often used in a variety of scientific fields, including physics, geology, and biology.

Physics

In physics, porous materials are often studied for their ability to let substances pass through them. This is known as permeability. The size and shape of the pores in a material can greatly affect its permeability. For example, a sponge is highly permeable because it has large, interconnected pores.

Geology

In geology, the porosity of a rock or sediment is the fraction of its volume that is taken up by pores. This can be important in determining the rock's ability to hold and transmit water, oil, or natural gas. Some types of rock, like sandstone and limestone, are often highly porous.

Biology

In biology, porous materials are often found in organisms. For example, human skin is porous, allowing sweat and oils to pass through it. Some types of plants also have porous leaves or stems, which can help them absorb water and nutrients.

See also

• Permeability (earth sciences)
• Permeability (biology)
• Permeability (material science)

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