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Pearson GCSE Chemistry

QuestionAnswer
In a composite material, what is the reinforcement? The substances bound together by the matrix material
In a composite material, what is the matrix? The substance that binds the reinforcement material together
What is a composite material A mixture of two or more materials with contrasting properties, combined to produce a material that has the properties of both
What is compressive strength? A measure of how well a material resists being squashed
What is meant by high-tensile strength How much a material resists being stretched
What is reinforced concrete? Concrete that is reinforced by steel
2 examples of composite materials that are man-made Concrete and fibre glass
An example of a natural composite material Wood
What is a ceramic material A hard, durable, non-metallic material which is generally unaffected by heat
4 examples of ceramics brick, procelain, china and clay
list propeties of ceramic materials chemically unreactive, stiff, hard but brittle. Poor electrical and thermal conductors. Have high melting points
Name the type of structure found in ceramic materials Giant structures with many stong bonds
2 properties that make glass suitable to make shower screens It is waterproof and chemicall unreactive
What is the size of a typical nanoparticle? 1 nm = 1 x 10-9m
Risk associated with some nanoparticulate materials can be harmful when breathed in due to their large surface area to volume ratio
Give one use of nanoparticles Sunscreens
What makes nanoparticles useful as catalysts? They have a very large surface area to volume ration
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