If you want, watch the video over and over again. The 11th installment of the Crash Course Engineering series focuses on cycles and repetition. It first reviews how heat engines work and applies the idea to heat pumps. It then explains how refrigerators work using the same concept.

Concepts

engines, heat, phase diagrams

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Additional Tags

science

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Instructional Ideas

• If available, have the class look at the back of a refrigerator to see its setup
  

Classroom Considerations

• Pupils should be familiar with heat engines from the previous video
• Knowledge of phase diagrams is helpful but not necessary
  

• This video is hosted on YouTube

Pros

• Diagrams and visual aids help with understanding
• Explanations are easy to follow
  

Cons

• None