Energy flows through food webs, it does not cycle within food webs, because it is lost as it is transferred from one trophic level to the next. Energy is lost in these transfers in the form of.... Heat Kinetic energy Light Potential energy Sound Chemicals and inorganic nutrients .... Move through ecosystems and then leave the ecosystem, lost as heat. Cycle within ecosystems, moving from living organisms to the soil, water, and air, and then back into living organisms again..