Axe blade and solar panel: what they have in common

1. Step 1. Axe blade — is part of — Axe. A wedge-shaped blade.
2. Step 2. Axe — is made of — Stone. A Neolithic axe is ground stone on a handle.
3. Step 3. Stone — is material for — Gothic cathedral. Cathedrals are built of dressed stone.
4. Step 4. Gothic cathedral — has part — Window glass. Stained glass.
5. Step 5. Window glass — is part of — Solar panel. Tempered cover glass.

Open Evothings