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MATERIALS (Common materials used to make manufactered goods (Plastics…

- - - - These allow Iight to pass through them,but don't allow oblects to be seen clearly.
    - - Other objects can be clearly seen throug them clearly
    - - The objects that you can't see through them
  - - - The capicity of materials to transimit sound
    - - Some materials don't transmit sound.
- - - - Sillk
      - Wool
      - Leather
    - - Iron
      - Marbel
      - Clay
    - - Wood
      - Cork
      - Cotton
- - - - They are harmful for the environment. They can be poisonus for living things.
    - - These are materials that decompose naturally and don't cause damage to the environment.
    - - These can be reused. They help conserve resources and avoid the accumulation of waste products.
  - - - This happens when a material reacts with oxygen in the air or water.