Diethyl ether and needle: what they have in common

1. Step 1. Diethyl ether — is made of — Ethanol. Made from ethanol.
2. Step 2. Ethanol — is material for — Cloud chamber. It is saturated with alcohol or water vapour.
3. Step 3. Cloud chamber — has part — Piston. A sudden expansion supersaturates the vapour.
4. Step 4. Piston — is part of — Syringe. A plunger.
5. Step 5. Syringe — has part — Needle. A hollow needle.

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