Friction and oil lamp: what they have in common

1. Step 1. Friction — is used in — Flintlock. A spark from a strike of flint.
2. Step 2. Flintlock — works like — Lighter. The same way of striking a spark.
3. Step 3. Lighter — has part — Wick. Petrol lighters have a wick.
4. Step 4. Wick — is part of — Oil lamp. The wick feeds oil to the flame.

Open Evothings