Human hair strand and electric generator: what they have in common

1. Step 1. Human hair strand — is part of — Hygrometer. The length changes with humidity.
2. Step 2. Hygrometer — is part of — Weather station. A hygrometer.
3. Step 3. Weather station — has part — Anemometer. An anemometer.
4. Step 4. Anemometer — uses — Wind power. It is turned by the wind.
5. Step 5. Wind power — is used in — Wind turbine. Wind energy.
6. Step 6. Wind turbine — has part — Electric generator. A generator.

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