Write down instructions for someone who is using the working model of windmill for the first time.
To use the working model of windmill: 1) Place the windmill in an area where there is natural wind or air movement. 2) Alternatively, use a fan or blow air towards the fan blades. 3) Observe how the wind/air causes the fan blades to rotate. 4) The rotating fan turns the straw (axle) which transfers the motion to the circular cardboard pieces inside the box. 5) Watch the complete mechanism working together - the propeller (fan blades) and wheel and axle (straw with circular pieces) converting wind energy into rotational motion. The windmill demonstrates how multiple simple machines work together to harness energy.
Explanation
The chapter describes the windmill as a machine that generates energy from wind. The working model uses a propeller (fan blades) and wheel and axle (straw with circular cardboard pieces) working together. When wind hits the blades, they rotate, turning the axle and demonstrating energy conversion.