Lesson 27: Combined Uses of Materials

Different materials can be used to make an object

( A ) This pair of shoes is made of leather, metal and 

Leather - strong and flexible
                - lasts longer and is comfortable to wear

Metal - strong so that the buckle will not break easily

Rubber - is water roof
                - gives the shoes a good grip on the ground

( B ) Electric plug is made of plastic or porcelain

- Plastic or porcelain are insulators of electricity

- The pins are made of metal because it is a     
   conductor of electricity

( C ) Window is made of glass

- Window is made of glass because glass is transparent

- The window frame is made of metal because is hard and      

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