Final answer:
The volume of groundwater that can be stored in a rock depends on the rock's porosity and permeability, affecting its ability to store and transmit fluids respectively.
Step-by-step explanation:
The volume of groundwater that can be stored within a rock is dependent on the porosity and permeability of that rock. Porosity is essentially the measure of how much open or void space is present within the rock, expressed as a percentage of the volume of open spaces compared to the total rock volume.
High porosity indicates more space for groundwater storage. On the other hand, permeability refers to the rock's ability to transmit fluids, which depends not only on porosity but also on the connectivity of those pores.
For a rock to act as a good aquifer and allow for water extraction, it must be both porous and permeable to ensure water can be stored and flow through it.