All products are made from materials of one sort or another - or even several sorts combined to have special properties that are particular useful.  For instance steel is a metal that has a range of qualities that include strength and ductility and this led to its use in making chain-mail armour in the Middle Ages.   Why do you think chain-mail is not used today by modern combat troops around the world - it certainly seemed effective when it was first used  - so why not now ?
               
Download the worksheet - the ‘Topic-Doc’ for this section and answer Question 1.
(Save the document with your name as a filename and then reopen it in Word)

As time has gone by the development of different materials has allowed different things to be made.  Use this timeline to find out the years when materials were first developed.  Click on the ‘Link’  Use ‘Topic-Doc-1’ and answer question 2.

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Timeline

Plastics