Build a Speaker
Build a Speaker https://www.sciencebuddies.org/stem-activities/make-a-paper-speaker Days: 2 Mode: Pairs or individual Take-home: Working paper speaker; reusable magnets/electronics returned
Teaching & key ideas
Key concepts: Electromagnetism, vibration, diaphragm, coil, sound.
Hook: Play sound through a working paper speaker and gently touch diaphragm to feel vibration.
Test / evidence: Speaker produces audible tone/music; compare diaphragm/coil changes if time.
Variables to change: Diaphragm size/stiffness; coil turns; coil-magnet gap.
Lesson flow
Lesson plan:
Day 1: build
Day 2: troubleshoot/test variables
Video:
How to Build a Paper Speaker
https://www.youtube.com/watch?v=liSEwqdq7aA
Safety / cleanup:
Low-voltage audio only; teacher checks circuits to avoid shorts/hot wire.