Kaolin and bicycle: what they have in common

1. Step 1. Kaolin — is a kind of — Clay. Kaolin is a white clay used to make porcelain.
2. Step 2. Clay — is material for — Spindle. The spindle whorl was shaped from clay or carved from stone.
3. Step 3. Spindle — uses — Angular momentum. Spinning the spindle twists the thread.
4. Step 4. Angular momentum — is used in — Bicycle. The spinning wheels and the steering geometry help keep balance.

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