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Grade 6 Science Unit 11 Energy
Energy Arrows Grade 6 Science Unit 11 Energy
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Learning Objectives To
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Energy arrow for a filament bulb
9 J wasted energy out 10 J energy in 1 J useful energy out
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Energy arrow for a filament bulb
9 J wasted energy out 10 J energy in 1 J useful energy out 6 J wasted energy out Sankey Diagram for an energy efficient bulb 10 J energy in 4 J useful energy out
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Why are they also called Sankey Diagrams?
Captain Matthew Henry Phineas Riall Sankey was an engineer. In 1898 he was the first person to publish a diagram that used the width of an arrow to show the size of the energy flow. The first ever Sankey diagram shows the energy flow in a real steam engine compared with a ‘perfect’ engine. Sankey diagrams are so useful that you can buy computer programs to draw them! Captain Henry Sankey (1853 – 1925)
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Plenary
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