Final answer:
The term for a material through which water readily flows is 'permeable'. Permeability depends on the porosity, size, and interconnectivity of the spaces within the material. Sedimentary rocks such as sandstone and limestone are examples of permeable materials.
Step-by-step explanation:
Material through which water readily flows is known as permeable. When discussing materials that water can flow through, permeability is a key factor.
Permeability refers to the ability of a geologic material to transport fluids. It is not just the porosity which means the presence of holes or spaces in the material, but also about the size and interconnectivity of those spaces. For effective water flow, the open spaces within a material must be connected.
Sedimentary rocks like sandstone and limestone are good examples of permeable materials that make good aquifers. In contrast, rocks that are impermeable do not allow water to flow through easily and include rocks like shale or un-fractured igneous or metamorphic rock.