For example, a grazing cow, a firing catapult and a boiling kettle are all doing 'work', as energy is being transferred. Diagrams can be used to show how energy is transferred from one store to ...

Sankey diagrams show that the total energy transferred into a system is equal to the useful energy transferred plus the energy dissipated or 'wasted'. This confirms that energy is conserved.

Each food chain is a descriptive diagram including a series of arrows ... Food webs can be used to reveal different patterns of energy transfer in terrestrial and aquatic ecosystems.