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C2- Materials and their Properties

Halima Noor Kazi Science Core GCSE Inglés 18 fichas

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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

Descripción: Complete revision notecards for GCSE OCR 21st Century Science Chemistry Module 2
Creado por: Halima Noor Kazi
Visitas: 34
Historial: Creado por emmarachel · 12 may 2015

Copiado por Halima Noor Kazi · 12 may 2015
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