A large store of underground water usually contained in porous rocks

A large store of underground water usually contained in porous rocks

• A. Lakes
• B. Aquifers
• C. Wells
• D. Reservoirs

Answer: (B)

An aquifer is an underground layer of rock or sediment that holds and transmits groundwater because it has enough porosity to store water and enough permeability to allow it to flow. When such a layer is capped by an impermeable or less permeable layer, the water is trapped, creating either a confined or unconfined aquifer. This makes aquifers the natural underground stores of freshwater. Lakes are surface bodies of water, not underground, so they don’t fit the description. Wells are vertical access points to groundwater within an aquifer, not the store itself. Reservoirs are large stores of water, usually on the surface (natural or artificial), not underground.

An aquifer is an underground layer of rock or sediment that holds and transmits groundwater because it has enough porosity to store water and enough permeability to allow it to flow. When such a layer is capped by an impermeable or less permeable layer, the water is trapped, creating either a confined or unconfined aquifer. This makes aquifers the natural underground stores of freshwater.

Lakes are surface bodies of water, not underground, so they don’t fit the description. Wells are vertical access points to groundwater within an aquifer, not the store itself. Reservoirs are large stores of water, usually on the surface (natural or artificial), not underground.