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?

Which statements describe sustainable development? multiple answer choice -fishing does not remove more fish from water systems than can be replaced by the number of fish that will be born to replace them. -sustainable development is development that is designed to improve the economic conditions in less-developed countries. -sustainable development is mainly a regional issue. -sustainable development means water is used at a rate that won't reduce the amount available for future use. - sustainable development policies only need to be concerned with environmental protection. - trees cannot be cut down faster than the number that will be replaced by new growth.