Halogen gas filling and electric fan: what they have in common

1. Step 1. Halogen gas filling — is part of — Halogen lamp. Iodine or bromine returns tungsten to the filament.
2. Step 2. Halogen lamp — is a kind of — Incandescent light bulb. An incandescent lamp.
3. Step 3. Incandescent light bulb — works like — Heating element. A lamp and a heater use the same effect — a conductor heated by current; they differ in purpose, light or heat.
4. Step 4. Heating element — is part of — Air fryer. A heater.
5. Step 5. Air fryer — has part — Electric fan. A fan.

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