- Give two properties that glass and plastic always share.
- Give two properties that glass and plastic sometimes share.
- What advantages do bottles made from plastic have?
- What disadvantages are there when you use plastic bottles?
- Which type of material is most suitable for making a toy for a baby? Give reasons for your choice.
- What are the disadvantages of using metal for a toy for a baby?
- What properties would you look for in materials to make a kite?