Watershed

a permeable rock layer than can hold or transport water

water beneath the Earth's surface

ability of a material to allow water to pass through

the measure of the concentration of hydrogen in a solution (e.g., acid, base)

surface land area where water enters an aquifer

water that collects above the surface of the ground

an area of land where all of the groundwater and surface water from the area drains from higher areas to lower areas and into the same body of water

the highest level of groundwater in an area, beneath the Earth's surface