Edexcel GCSE Chemistry · 1CH0
Specification 9.39C · Paper 2
Revise: Material SelectionStiffness is resistance to bending or elastic change of shape. A stiff material does not necessarily have the greatest breaking strength.
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GCSE Chemistry · key term
Resistance to elastic bending or changing shape under a force.
Used by Edexcel and OCR
Specification 9.39C · Paper 2
Revise: Material SelectionStiffness is resistance to bending or elastic change of shape. A stiff material does not necessarily have the greatest breaking strength.
Specification C6.1r · Paper 2 (Foundation), Paper 4 (Higher)
Resistance to deformation under a force; a stiffer material changes shape less under the same conditions.
Revise: Comparing Material PropertiesTensile strength concerns how much pulling stress a material withstands before breaking, while stiffness concerns how much it deforms under a force. These are not interchangeable: something can be stiff yet brittle. Glass and fired clay, for example, are rigid but can crack rather than bend.
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
Resistance to changing shape when a force is applied.
Revise: Comparing material propertiesStiffness concerns how much a material changes shape under a force, before failure. A stiff strip bends only a little; a flexible strip bends more easily. Comparing strips fairly requires comparable lengths, widths and thicknesses, because shape and size also affect bending.
The ability of a material to resist bending or changing shape when a force acts on it.
Resistance to bending or changing shape.
Check that values describe the same property and use matching units. Density, tensile strength and stiffness measure different things.
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