Kettle and electrical grid: what they have in common

1. Step 1. Kettle — evolved into — Electric kettle. A kettle with a heater.
2. Step 2. Electric kettle — has part — Heating element. A heating element in the base heats the water.
3. Step 3. Heating element — is a kind of — Resistor. A heater is a resistor designed to release heat.
4. Step 4. Resistor — uses — Electrical resistance. Sets a resistance.
5. Step 5. Electrical resistance — is used in — Power line. High voltage reduces resistive losses.
6. Step 6. Power line — is part of — Electrical grid. Power lines.

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