Chisel blade and archimedes’ screw: what they have in common

1. Step 1. Chisel blade — is part of — Chisel. A sharpened steel plate.
2. Step 2. Chisel — has part — Handle. A wooden or plastic handle.
3. Step 3. Handle — is part of — Knife. A handle.
4. Step 4. Knife — is part of — Meat grinder. A cross-shaped blade.
5. Step 5. Meat grinder — has part — Auger. An auger.
6. Step 6. Auger — evolved from — Archimedes’ screw. The Archimedes’ screw as a conveyor.

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