Butter churn and petri dish: what they have in common

1. Step 1. Butter churn — uses — Lever. A dasher.
2. Step 2. Lever — is used in — Vernier caliper. The jaws open like a lever.
3. Step 3. Vernier caliper — is made of — Stainless steel. Stainless steel.
4. Step 4. Stainless steel — is material for — Saucepan. Stainless steel.
5. Step 5. Saucepan — has part — Pot lid. A cap.
6. Step 6. Pot lid — is part of — Petri dish. A cap.

Open Evothings