Terrace farming and bicycle: what they have in common

1. Step 1. Terrace farming — uses — Irrigation. Terraces were irrigated by channels.
2. Step 2. Irrigation — uses — Archimedes’ screw. The Archimedes’ screw lifted water for irrigation.
3. Step 3. Archimedes’ screw — has part — Crank. A handle or rotary drive.
4. Step 4. Crank — is part of — Bicycle drivetrain. The cranks turn the motion of the legs into rotation.
5. Step 5. Bicycle drivetrain — is part of — Bicycle. The drivetrain transfers the force of the legs to the rear wheel — the main difference from a kick scooter.

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