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Its not contaminated or toxic which has been detected in toys made of PVC

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Is readily available (if the material is very good but noy very common in our town or county)

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We can buid with ans is available

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Is as cheap as possible or is good value for money (for example, pine furniture)

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Feels nice to touch (like a silk shirt)

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Makes the product looks attractive (like marble or sculptures).

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As little as possible (important for flying objetc)

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Will be strong enough for the object (for example, concrete dam)

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Toxicity, ease of recycling, biodegradability.

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Resistance to rusting

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Materials with this property grow bigger when they temperature rises.

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Electrical conductivity, thermal conductivity and sound conductivity 

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Electrical conductivity, thermal conductivity and sound conductivity 

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Materials that allow electricity heat and sound respectively, to pass true them have this properties.

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This is the ability of a material to be pressed or rolled into a sheet. Gold and paper are examples of malleable materials.

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This is the ability of a material to be stretched into a wire. Nynlon and copper are examples of ductile materials.

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This are properties related to the senses: colour, feel or texture, brightness, etc. They also included optical properties. The optical properties of object can be: transparents, transluced and opacue.

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this is the ability of a material to be deformed. The opposite of deformability is rigidity. If a material is deformable it can be elastic or plastic.

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this is the resistance of a material to being brocken when we  strike it the tools we use to strike objects and sport equipment used to hit balls tenis racets  hokey stiks golf clubs and baseball bats are made of thoug materials the oposite of thoug is brittel glass and proceslain areexamples of britteaterials that aare easli broken

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they doo not let any lighttrhoug

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they let light trhought but we can not see throught them

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they let light throug and allow us to see through them

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thisis the resistance of a material  to being scrached or pierced for example steel and diamond are hard wheares co0tton sand and plasticine are soft

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any material used to construct an object is caled technical materials

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when we proces raw materials they become procesed materials olso caled manufactured materials

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we prepare or refine raw materials to obtain natural matirials

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are materials taken directli from nature that we process into other materials to make products with