Multiple choice What is an aquifer? A hole dug underground The space between the rocks below the water table The pores in the leaves for transpiration A pump to pump out the underground water A place built to store water in the village Reveal answer Fill a bubble to check yourself B Correct answer Explanation Yes, the space in between layers of hard rocks is called an aquifer. An aquifer is an underground layer of water-bearing permeable rock or unconsolidated materials (gravel, sand, or silt) from which groundwater can be extracted using a water well.