Design and construct a device to communicate across a distance using light and/or sound.
Obtain, evaluate, and communicate information about how sound is produced and changed and how sound and/or light can be used to communicate.
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Ask questions to identify and compare sources of light.
Explain how shadows are made.
Carefully distinguish observations from ideas and speculation about those observations.
Construct an explanation for how structures made from small pieces (linking cubes, building blocks) can be disassembled and then rearranged to make new and different structures.
Describe how light, heat, and motion energy are used.