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MATERIALS, (imagen), imagen, imagen, imagen, imagen, imagen, imagen,…
MATERIALS
Raw Materials
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• a nimal ongm: wool, silk, hides ...
• v egetable ongin. cotton, wood, cork, linen
• mineral ongin marble, clay, iron ...
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• Elecrical conductivity. Some mat<mals conduct electricity,
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• Electrical insulation. Some matenals dont conduct electomty,
e.g, plastic mateoals and wood
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- We get raw matenals from nature
- We process them to make matenal<
- We make goods with these materials.
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conte is<linn of the material changes For example, petrol
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The termal properties: conductivity, expansion and contraction, fusibility, welding
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Optical propertie: opaque, traslucent and transparent
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Other properties
Density, porosity,permeability,impermeability
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. Ecological properties: recyclable materials,toxic materials,bideogradable materials
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Technical materials: WOOD, METALS, PLASTICS,TEXTILES,STONE, CERAMICS.
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Mechanical properties: tensile, compressive, shear, flexular, torsional.
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