Build a Weather Instrument
Build a Weather Instrument https://www.sciencebuddies.org/teacher-resources/lesson-plans/make-anemometer-measure-wind-speed Days: 2 Mode: Pairs or individual Take-home: Cup anemometer
Teaching & key ideas
Key concepts: Wind speed proxy, rotation, counting, calibration idea.
Hook: Show rotation count changing when fan speed changes.
Test / evidence: Count rotations in 15 seconds at two fan settings; repeat.
Variables to change: Cup size/orientation; arm length; fan speed/distance.
Lesson flow
Lesson plan:
Day 1: build
Day 2: calibrate/test
Video:
How to Build an Anemometer
https://www.youtube.com/watch?v=KummzMtaI6Y
Safety / cleanup:
Teacher manages pushpins or use printed hubs; eye protection during fan testing optional.