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Unit 6 Material properties (Lala, but acutally made by Ken and Curtis) -…

- - - - Non-metals are not as strong or hardwearing as metals.
      - Many non-metals are gases.
      - The non-metals that are not gases have low melting points and low boiling points.
- - - - Plastic can be transparent or opaque.It can be moulded into many shapes.
        Plastic can be used for containers for food and drink it does not react with the food.
        Plastic is light weight, and can be coloured brightly. Some plastic can be recycled.
        But plastic takes a very long time to break down and this causes problems with disposal and litter. Plastic may be affected by heat and may change shape.
  - - - It is waterproof and do not react with the food or drink. Glass is cheap and can be made into many shapes also recycle. Glass is very heavy and brittle causing disadvantages.