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ZINC---It is bluish-white in colour and is one of the least common metals

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ALUMINIUM---Is the third most common element in the earth's crust

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TIN---Is a silver-coloured shiny metal that is very resistant to corrosion

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COPPER---This is bright,red-coloured metal that has been used since ancient times to make ornaments,coins and even weapons.

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CAST IRON--- Is made from iton and 2% to 6.6% carbon.

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STEEL---Is a ferrous material made mainly from iron with 0.1% to 2% carbon.

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TENSILE  STRENGHT--- It is good in the longitudinal  durection.

COMPRESSIVE STRENGHT--- It is better in the transverse direction than in the longitudinal direction

FLEXURAL STRENGHT---It is good, but better in the transverse direction.

HARDNESS--- This can vary a lot. It depends on the type of wood,the structure and the cutting direction.

THOUGHNESS---Wood is though, so it is used in sports equipment like hockey sticks,baseball bats and tennis rackets.

THERMAL AND ELECTRICAL CONDUCTIVITY---It is very low.Wood is a good insulator of heat and electricity.This is why wood is used to make handles for tools.

SOUND CONDUCTIVITY---Good.This is why it is used as a material to make certain musical instruments.

COLOUR---Different woods have different colours.

DENSITY---Wood is a light material. It has lower density than water, wich means that it floats.

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MAN-MADE WOOD/Enchances the properties of natural wood and reduces its price,although it does not look as attractive as natural wood.

PLYWOOD---Is formed by an odd  number of thin wood layers called veneers that are laid on top of each other and bonded together with adhesive.

CHIPBOARD---Is obtained from wood chips that are mixed with resin and the pressed.

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PAPER---Is obtained by forming a paste out of wood and plant fibres that is mashed and then pressed and dried.

CARDBOARD---Is made by compressing several layers of paer while it is wet to thicken it and produce a heavier texture

CORK---Is obtained from the bark of the cork oak.

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IRON---When the percentage of carbon in the alloys is less than 0.1%,we call this material iron