Consider the nonsense units of mass: 5 zaps = 1 zoom; 1 dip = 4 pops; 18 zaps = 1 pop Find the mass of a certain brick in dips if it has a measured mass of 71.3 zooms.

aquifers are bounded above and below by impermeable rock. the driving force of groundwater movement in confined aquifers is pressure, rather than gravity.

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.