Technical concept lesson template: make the relationship visible

Prompt

Create a 45-second 16:9 technical concept lesson for secondary-school students learning about energy transfer. Use https://www.energy.gov/cmei/water/how-hydropower-works and https://www.usgs.gov/water-science-school/science/hydroelectric-power-how-it-works as the factual references. The learner's opening question is: How does water behind a dam become electricity? Use Machine anatomy style: one independently drawn isometric cutaway of a conventional reservoir hydropower plant, with the reservoir above the downstream river, an intake, a pipe labelled PENSTOCK, a turbine below the generator, a shaft visibly joining them, power lines leaving the generator, and the water outlet returning to the river. Keep these same components and connections consistent throughout. No presenter. Use friendly English narration with clear labels and no background music. Structure the lesson as question, mechanism, recap and a check question. Open on the whole plant and the learner's question. Then follow moving water from the reservoir into the penstock and turbine. Show that moving water spins the turbine, the shaft turns the generator, and the generator converts that motion into electricity carried by the power lines. Show the water continuing downstream after the turbine. Use a close view of the turbine-shaft-generator connection to make their different roles clear; keep the water path separate from the electrical lines. Return to the whole figure for the recap, highlighting water movement, turbine rotation and generator output in that order. End with the on-screen and narrated check question: Which part converts the spinning motion into electricity? Hold the question for two seconds, then highlight the generator and answer: The generator. The turbine supplies the turning motion. This is a question within the video, not a clickable quiz. Finish with a readable source credit to the US Department of Energy and USGS, without their logos or endorsement. Keep it a conceptual teaching diagram without invented dimensions, output numbers or engineering simulation claims.