Clay tandoor jar and electronic calculator: what they have in common

1. Step 1. Clay tandoor jar — is part of — Tandoor. A clay bulb heated red-hot from inside.
2. Step 2. Tandoor — uses — Combustion. Fire heats the walls of the tandoor.
3. Step 3. Combustion — is a kind of — Oxidation. Combustion is rapid oxidation.
4. Step 4. Oxidation — is used in — Electrochemical reaction. Redox reactions.
5. Step 5. Electrochemical reaction — is used in — Alkaline battery. An electrochemical reaction.
6. Step 6. Alkaline battery — is part of — Electronic calculator. A calculator runs on a battery, sometimes on a tiny solar panel.

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