Tower clock and aeroplane: what they have in common

1. Step 1. Tower clock — has part — Bell. The chime of the clock.
2. Step 2. Bell — is part of — Diving bell. A body open at the bottom.
3. Step 3. Diving bell — uses — Archimedes’ principle. Sinking with ballast.
4. Step 4. Archimedes’ principle — is used in — Seaplane. Floats.
5. Step 5. Seaplane — is a kind of — Aeroplane. An aircraft.

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