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Awarded the NGSS Design Badge
Science Discipline: Physical Science
Year Reviewed: 2019
This unit launches with a slow-motion video of a speaker as it plays music. In the previous unit, students developed a model of sound, but this unit opens the door for students to investigate the cause of a speaker’s vibration as opposed to the effect.
Students dissect speakers to explore the inner workings, and they build homemade cup speakers to manipulate the parts of the speaker. They identify that speakers of all kinds have some of the same parts--a magnet, a coil of wire, and a membrane. Students investigate each of these parts to figure out how they work together in the speaker system. Along the way, students manipulate the components (e.g., changing the strength of the magnet, number of coils, current direction) to see how this technology could be modified to apply to systems in very different contexts, like MagLev trains, junkyard magnets, and electric motors.
Link to Materials
The NGSS Design Badge is awarded only to the version of this unit that was reviewed. If any modifications are made to this unit, the revised version cannot be promoted as having earned the badge.
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