Terrace farming and piston pump: 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 — uses — Screw. A rotating helical surface lifts water.
4. Step 4. Screw — is used in — Jack. A screw jack.
5. Step 5. Jack — has part — Piston pump. A hand plunger pump.

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