What's covered
Materials (polymers, ceramics, composites)10
Sample questions
A taste of the 10 questions in this topic — answers marked. Sign up to practise the full set with spaced repetition.
1Materials (polymers, ceramics, composites)
What is a polymer?
- •Liquid that thickens when heated
- ✓Long chain of repeating units (monomers)
- •Mixture of two different metals
- •Solid clay heated to harden
2Materials (polymers, ceramics, composites)
What is the most common polymer used in plastic bottles?
- •nylon (a polyamide plastic)
- ✓PET (polyethylene terephthalate)
- •polystyrene (PS)
- •PVC (polyvinyl chloride)
3Materials (polymers, ceramics, composites)
Why are polymers like polyethylene useful?
- •Conduct electricity well
- •Melt at very low temperatures
- ✓Strong, light, cheap, mouldable
- •Very heavy and rigid
4Materials (polymers, ceramics, composites)
What is a ceramic?
- •Conductive metal alloy
- •Glassy liquid at room temperature
- ✓Hard, brittle, heat-resistant material
- •Soft, flexible plastic
5Materials (polymers, ceramics, composites)
What is a composite material?
- •A liquid mixed with a gas under pressure
- •A single very pure metal element in nature
- •An element straight from the periodic table
- ✓Two or more materials combined for better properties
6Materials (polymers, ceramics, composites)
What composite is concrete an example of?
- •carbon fibre + resin
- ✓cement + aggregate
- •glass + polymer
- •iron + carbon
Try it for four weeks. Free.
One school. Unlimited classes. No card limit. No teacher limit. If your students aren't practising daily by the end of the trial, you owe us nothing.