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Raw materials are materials taken directly from nature that we process into other materials to make products.

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We prepare raw materials to obtain natural materials.

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When we process raw materials, they become procesedd materials( also called manufactore materials).

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Hardness: This is the resistance of a material to being scratched or pierced.
Thoughness: This is the resistence of a materials to being broken when we strike it.
Deformability: This is the ability of a material to be deformed. The opposite of deformability is rigidity.
Ductility: This is the ability of amaterial to be stretched into wire.
Melleability: This is the ability of a material to be pressed  or rolled into a sheet.

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-Plywood: Is formed by veneers
-Chipboard: Is obtained from wood chips

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-Tensile strenght: It´s good in the longitudinal direction and poor in the transverse direcion
-Compressive strenght: It´s better in the transverse direction
-Flexural strenght: This was used a lot in the past to make pots and beams.
-Hardness: This can vary a lot. It depends on the type of wood, destructure and the cutting direction.
-Toughness: It is used in sports equipment.
-Thermal and electrical conductivity: Wood is a good insulator of heat and electricity.
-Sound conducivity: This is used to make certain musical instruments.
-Colours: Different woods have different colours.
-Density: Wood is a light material.

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Mchanical properties:
Hard:They dont scratch.
Maleable:We can press the metal into thin sheets and it will not break.
Ductile:We can stretch metals into wires.
Tough:They are very resistant to breaking.
Thermal properties:
-Good conductor
-They expand when the temperature ríes and contract when it falls.
-Some metals can easily be soldered.
Elelectrical and magnético properties:
-Good conductors.
-Magnetic behaviour.
Other properties:
-Rust
-Conductor of sound
-Solid
-Heavy
-Dense

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Wood products include man-made wood and wood derivates.

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-Paper: Is obtained by forming a paste
-Cardboard: Is made by compressing several layers of papers
-Cork: Is obtained from the bark of the cork oak