Oven mouth e needle: o que têm em comum

1. Passo 1. Oven mouth — faz parte de — Oven. An opening for loading and draught.
2. Passo 2. Oven — é utilizado em — Pão. Bread is baked in an oven.
3. Passo 3. Pão — utiliza — Quern. Flour was ground on millstones.
4. Passo 4. Quern — é um tipo de — Stone tool. A quern is two stones: the upper one is turned on the lower to grind grain.
5. Passo 5. Stone tool — evoluiu para — Needle. Bone needles with an eye are part of the Palaeolithic toolkit.

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