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Raw matirials are matirials taken directlyfrom nature that we process into other matirials to make matirials to make products whith.

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WE PREPARE OR REFINE RAW MATIRIALS  TO OBTAIN NATURAL MATIRIALS

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When we process raw matirials, they become processed matirials (also called manufactured materials)

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Any material used to construct is called technical material

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-Toughness
-Deformability
-Ductility
-Malleability

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-restance to rusting
-toxicity,easy to recicle, biodegradability

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-Transparent
-Translucent
-Opaque

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-Electrical, thermal,sound conductivity
-thermal expansionm

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-resistant to straching
-resistant to bending
-is very hard
-wood is touhg
-is not a good electrical and conductor
-is a good sound conductor
-the diferent tipes of wood have diferent tipes of colour
-wood is low density matirial it floats

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MAN-MADE:
-the more important tipes are Plywood thatis formed by thin layers of wood, and
Chipboard is obtein fom wood chips that are joined with resin

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-Paper
-Carboard
-Cork

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-Iron when the percent of carbon in the alloy 0.1% we call this matirial IRON.
-Steel is aferrous matirial made mainly from iron with 0.1% to 2% carbon.
-Cast Iron is made from iron 2% to 6.67% carbon.

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-COPPER is a good conductor of heat and electricity, it is highly resistant to corrosion, it is very malleable and easy to solder.
-TIN it is very ductible and malleable when cold, it is very easy to work with and to melt, is used for solding.
ALLUMINIUM it is very light, is resistant to corrosion, is it a good conductor of heat and electricity, is not toxic so is used in food packaging, is very ductible and malleable, is easy to shape.
ZINC is it malleable and ductible , is resistant to corrosion and rust, is it a good conductor of heat and electricity,