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...Amu city school aligarh muslim university class viii subject science chapter synthetic fibres and plastics fabrics the clothes which we wear are made of from obtained natural or artificial sources types i e plants animals called for examples cotton silk wool etc see fig given below by human beings manmade all prepared a number processes using raw materials petroleum origin petrochemicals rayon nylon acrylic polyester terylene muhammad iliyas khan you have seen uniform pattern found in necklace beads joined with help thread try to join paper clips together make long chain as b fibre is also small units each unit actually chemical substance many such combine form large single polymer word comes two greek words poly meaning mer part so repeating polymers occur nature example cellulose up glucose towards end nineteenth century scientists were successful obtaining having properties similar that treatment wood pulp this although source yet it man cheaper than can be woven like dyed wide vari...