6. Which of the following is a smart material?
- Acrylic
- Cornstarch polymer
- Polythene sheet
7. When would epoxy resin glue be used
- As a temporary fixing
- To join two different sorts of material
- To join plastics, especially polystyrene.
8. What unit is the thickness of paper measured in?
- Grams per square metre
- Microns
- Grams per square millimetre
