Ferrocerium (lighter flint) and electric generator: what they have in common

1. Step 1. Ferrocerium (lighter flint) — is part of — Lighter. The flint strikes sparks.
2. Step 2. Lighter — has part — Wick. Petrol lighters have a wick.
3. Step 3. Wick — is part of — Davy lamp. A wick.
4. Step 4. Davy lamp — uses — Heat transfer. The gauze draws off heat and stops the flame.
5. Step 5. Heat transfer — is used in — Combined heat and power plant. Waste heat goes to heating.
6. Step 6. Combined heat and power plant — has part — Electric generator. The turbine turns the generator.

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