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7.2

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7.2 Animals, models and energy 26 June 2022 Name a famous waterfall Where is it located? Which waterfall is the largest in the world? What is interesting about the temperature of water at the bottom of a waterfall?
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Page 1: 7.2

7.2 Animals, models and energy8 April 2023

Name a famous waterfall

Where is it located?

Which waterfall is the largest in the world?

What is interesting about the temperature of water at the bottom of

a waterfall?

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Aims

• Develop experimental design skills as well as data interrogation. [Level 5]

• Look at examples of the energy transfers that take place in simple machines. [Level 5]

• Use the idea that energy is conserved during transfers to explain that missing energy is dissipated energy. [Level 6]

• Explain why it is advantageous for machines to be energy efficient. [Level 7]

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Key words

• Efficiency

• Joule (kilojoule)

• Conserved

• Dissipated

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Energy efficient

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Pendulum swing

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V formation

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Energy transfers

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Energy efficiency

Energy cannot be created or destroyed, only changed

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Worked example: light bulb

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Energy dissipation

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And finally…

• Write down 5 examples of energy transfers using …. -> …..

• How could the transfer be made more efficient?

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Homework

Read the book!


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