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          3. Wood and its derivatives
        
        
          
            www
          
        
        
          2.
        
        
          CLASSIFYING WOOD
        
        
          There are lots of different types of wood but for technical purposes we classify them
        
        
          into two types: hardwoods and softwoods.
        
        
          
            Hardwoods
          
        
        
          
            Softwoods
          
        
        
          Hardwoods usually come from deciduous
        
        
          1
        
        
          trees. They grow
        
        
          slowly and have thick, compact trunks. They contain little resin
        
        
          and can be many different colours.
        
        
          Softwoods are usually from conifer trees, with needle-shaped
        
        
          leaves. They grow quickly, contain a lot of resin and are pale-
        
        
          coloured. They are light and easy to work with.
        
        
          
            Tree type
          
        
        
          
            Uses
          
        
        
          
            Tree type
          
        
        
          
            Uses
          
        
        
          
            Beech
          
        
        
          Used in furniture and floors
        
        
          because it bends and is easily
        
        
          shaped. Also used to make
        
        
          toys, kitchen utensils, tool
        
        
          handles...
        
        
          
            Pine
          
        
        
          Used in furniture, electrical
        
        
          posts, boats, floors...
        
        
          
            Oak
          
        
        
          Used in furniture, doors,
        
        
          windows, parquet floors,
        
        
          boats, barrels...
        
        
          
            Silver fir
          
        
        
          Used in building, boats, simple
        
        
          furniture, carpentry, boxes,
        
        
          paper...
        
        
          
            Mahogany
          
        
        
          Used in joinery, luxury
        
        
          furniture, handmade objects,
        
        
          musical instruments (pianos,
        
        
          clarinets and violins)...
        
        
          
            White poplar
          
        
        
          Used in furniture frames,
        
        
          plywood, paper...
        
        
          Understand
        
        
          6.
        
        
          What are the grain and knots in wood? Look up information about
        
        
          different types of wood.
        
        
          
            a)
          
        
        
          Why are there fewer knots in hardwoods?
        
        
          
            b)
          
        
        
          What is the grain like in hardwoods?
        
        
          7.
        
        
          What’s the relationship between a tree’s growth and its wood’s
        
        
          resistance? What about its growth and its density?
        
        
          Apply
        
        
          8.
        
        
          What type of woodwill you use for your puzzle: hardwood or softwood?
        
        
          Which tree type? Why?
        
        
          ❚❚
        
        
          Wood is classed as hardwood
        
        
          or softwood.
        
        
          ❚❚
        
        
          It is used mainly in building,
        
        
          making furniture and paper.
        
        
          
            Key concepts
          
        
        
          ADVANCE
        
        
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          EDITION