Pot lid and rolling mill: what they have in common

1. Step 1. Pot lid — is part of — Saucepan. A cap.
2. Step 2. Saucepan — evolved from — Pottery. The first pots were ceramic.
3. Step 3. Pottery — uses — Potter’s wheel. The wheel made shaping vessels faster and more even.
4. Step 4. Potter’s wheel — works like — Wheel. A potter’s wheel is a spinning disc; it is sometimes seen as a forerunner of the transport wheel.
5. Step 5. Wheel — includes — Water wheel. A water wheel is a wheel with paddles turned by flowing water.
6. Step 6. Water wheel — is used in — Rolling mill. The first mills were turned by water.

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