to as the responding variable), usually graphed on the y-axis ??? ??? ??? enerygy pyramid a graphical representaiton showing the flow of energy through an ecosystem ??? ??? ??? inertia the resistance of an objec to a change in the speed or direction of its motion ??? ??? ??? media (medium) an intervening substance, such as air, through which a force acts or an effect is produced ??? ??? ??? organ