Sponge and oil well: what they have in common

1. Step 1. Sponge — uses — Capillary action. It absorbs by capillary action.
2. Step 2. Capillary action — is used in — Wick. Fuel rises up the wick by capillary forces.
3. Step 3. Wick — is part of — Kerosene lamp. A wick.
4. Step 4. Kerosene lamp — uses — Kerosene. The fuel.
5. Step 5. Kerosene — is made of — Crude oil. A fraction of crude oil.
6. Step 6. Crude oil — uses — Oil well. Oil is extracted from wells.

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