Use tools and materials to design and build a device that used light or sound to solve the problem of communicating over a distance.
Sound can make matter vibrate and vibrating matter can make sound.
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An object can be seen when light reflected from its surface enters the eyes.
Develop a model to describe that light reflecting from objects and entering the eye allows objects to be seen.
Identify and describe the variety of energy sources
Make observations to construct an evidence-based account of how an object made of a small set of pieces can be disassembled and made into a new object.
Apply scientific ideas to design, test and refine a device that converts energy from one form to another.