Material Properties and Selection
Relating physical and working properties to function, manufacture, environment, cost, availability, culture and ethics.
How to prepare for the GCSE Design and Technology written exam
Move from requirement to evidence, technical principle, comparison and justified decision. Use current board materials separately for the NEA and for full timed-paper rehearsal.
Core concepts
Concept 1
A property describes material behaviour, while a characteristic such as stock form, appearance or cost may also affect selection without being an intrinsic property.
Exam cue: State the required behaviour, name the relevant property and explain how it supports the function.
Concept 2
Selection is a multi-criteria decision involving functional, aesthetic, manufacturing, environmental, social, cultural, ethical, availability and cost factors.
Exam cue: Compare alternatives using the same criteria and acknowledge a meaningful trade-off.
Concept 3
Material performance depends on context, dimensions, form, processing and environment, so naming a material without a linked property is incomplete reasoning.
Exam cue: Distinguish quantitative property data from a general descriptive claim.
Risk pitfalls and guardrails
Using strong as an all-purpose property without naming the load or failure mode.
Guardrail: Do not substitute one board's specialist route or current product claim for the multi-board core, and do not turn written process knowledge into NEA or practical submission material.
Selecting a material solely because it is recyclable.
Guardrail: Do not substitute one board's specialist route or current product claim for the multi-board core, and do not turn written process knowledge into NEA or practical submission material.
Confusing hardness, toughness, stiffness and strength.
Guardrail: Do not substitute one board's specialist route or current product claim for the multi-board core, and do not turn written process knowledge into NEA or practical submission material.
Memory anchors
Strength
Ability to withstand an applied force without failure.
Stiffness
Resistance to elastic deformation under load.
Toughness
Ability to absorb energy and resist fracture.
Hardness
Resistance to scratching, indentation or wear.
Ductility
Ability to be drawn or plastically deformed in tension without breaking.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
Which property describes resistance to indentation or scratching?
A hammer head must resist sudden impacts without fracturing. Which property is most important?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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