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Materials (polymers, ceramics, composites)10
Practice questions with answers
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
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