Write down instructions for someone who is using propeller boat for the first time.
To use the propeller boat: 1) Hold the boat with one hand. 2) Use your other hand to wind the rubber band by rotating the propeller (bottle cap paddle wheels) several times in one direction. 3) Keep the propeller held in place so the rubber band stays wound. 4) Place the boat gently in water (a basin, tub, or pond). 5) Release the propeller and watch the boat move forward as the rubber band unwinds and turns the propeller. The stored energy in the rubber band converts to motion, pushing the boat through water.
Explanation
Activity 3 explains that a propeller is a wheel with blades that helps movement by pushing through water or air. The rubber band mechanism stores potential energy when wound, which is released as kinetic energy to rotate the propeller and propel the boat forward.