Consider how “porosity” and “permeability” affect how well an underground rock unit can store and transmit groundwater. a. what is the difference between porosity and permeability?
b. why do igneous and metamorphic rocks typically display low porosity, but yet sometimes produce the properties suitable for the flow of groundwater?
c. consider the “do-it-yourself porosity demonstration” described on p. 319 and in figure 12.6 of your textbook. if 200 ml of water were left in the beaker after saturating the sand in the other beaker, what is the porosity of the sand?