Electrolyte and conveyor belt: what they have in common

1. Step 1. Electrolyte — is part of — Lithium-ion battery. The electrolyte conducts ions but not electrons.
2. Step 2. Lithium-ion battery — is part of — Electric bicycle. A battery.
3. Step 3. Electric bicycle — has part — Roller chain. The chain drive from the pedals remains.
4. Step 4. Roller chain — is part of — Escalator. A chain pulls the steps.
5. Step 5. Escalator — works like — Conveyor belt. An escalator is a conveyor with steps.

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