Anzol e incandescent light bulb: o que têm em comum

1. Passo 1. Anzol — é feito de — Osso. Ancient hooks were carved from shell and bone.
2. Passo 2. Osso — é material para — Toothbrush. Addis’s toothbrush has a bone handle.
3. Passo 3. Toothbrush — é feito de — Plant fibre. The bristles were hog hair, later nylon.
4. Passo 4. Plant fibre — é material para — Wick. A wick is twisted from plant fibres.
5. Passo 5. Wick — faz parte de — Oil lamp. The wick feeds oil to the flame.
6. Passo 6. Oil lamp — evoluiu para — Incandescent light bulb. The electric lamp replaced oil and gas lamps.

Abrir Evothings