Flashcards
C2- Materials and their Properties
Flashcards do conjunto (18)
- 1Give two examples of materials from plants.Wood
Cotton - 2Give two examples of materials from animals.Wool
Leather - 3Give two examples of synthetic materials.Rubber
Paints - 4Where do the raw materials needed for synthetic materials come from?The earth's crust
- 5What is strength?How good a material is at resisting a force
- 6What is the difference between tensile and compressive strength?Tensile strength means that a material can resist a pulling force
Compressive strength means that a material can resist a pushing force - 7What is stiffness?How much a material bends
- 8What is hardness?How difficult a material is to cut
- 9What is density?A materials mass per unit volume
- 10What are properties of plastics?Hard, strong and stiff
Low density
Mouldable - 11Name three uses of plastics.Cases for televisions, computers and kettles
- 12What are the properties of rubber?Strong but soft and flexible
Mouldable - 13Name a use of rubber.Car tyres
- 14What are the properties of nylon fibres?Soft and flexible
Good tensile strength - 15Give two uses of nylon fibres.Ropes
Clothing fabrics - 16What properties would a material for cooking utensils need to have?Non-toxic
High melting point
Non-flammable - 17What properties does a material for a children's toy need to have?Non-toxic
Strong
Stiff
Low density - 18What are the four key structural differences?1. Crystallinity
2. Chain length increase
3. Cross-Linking
4. Use of plasticisers
Informações
- Descrição
- Complete revision notecards for GCSE OCR 21st Century Science Chemistry Module 2
- Criado por
- Halima Noor Kazi
- Visualizações
- 34
- Histórico
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- Criado por emmarachel · 12 mai 2015
- Copiado por Halima Noor Kazi · 12 mai 2015
- Avaliação
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