Materials

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Across
  1. 2. Transparent material for windows.
  2. 4. Strong paper used for boxes.
  3. 8. Hard, natural material used in buildings.
Down
  1. 1. Durable material from animal skin.
  2. 3. Natural fiber used for warm clothes.
  3. 5. Flexible material used in tires.
  4. 6. Synthetic material molded into shapes.
  5. 7. Material from trees, used in furniture.