PD GCSE Year 10 Flashcards
property
Anything that describes the appearance or structure of a material or how it reacts to forces or elements.
mechanical properties
Properties associated with how a material reacts to external forces.
strength
The ability of a material to withstand a force without breaking or bending permanently.
compressive strength
The ability of a material to withstand a ‘squashing’ force.
tensile strength
The ability of a material to withstand a pulling/stretching force.
malleability
The ability of a material to permanently change shape by being pressed or rolled.
elasticity
The ability of a material to return to its original shape after it has been deformed.
plasticity
The ability of a material to change shape permanently without cracking or breaking.
ductility
The ability of a material to permanently change shape by being
hardness
The ability of a material to withstand scratching, cutting or denting.
toughness
The ability of a material to withstand sudden shock, without breaking or denting.
brittleness
When a material cannot absorb energy resulting in the material breaking into pieces - opposite to toughness.
durability
The ability of a material to withstand wear, tear and weathering (deterioration).
stiffness
The ability of a material to resist bending.
stability
The ability of a material to resist changes in shape over time.
physical properties
Properties associated with the appearance & structure of a material.
aesthetics
The appearance of a material.
density
The compactness of a material.
transparency
The amount of light transmitted through materials.
texture
The feel of a material.
thermal conductivity
The ability of a material to allow heat to flow through it.
electrical conductivity
The ability of a material to allow electricity to flow through it.
non toxic
Not poisonous.
water resistant
The ability of a material to resist ta liquid passing through it to some degree.
waterproof
The ability of a material to completely resit a liquid passing through it.
hardwood
Timbers from deciduous trees (those that lose their leaves). Expensive due to not being sustainable.
softwood
Timbers from coniferous trees (evergreens that don’t lose their leaves/needles). Relatively cheap as sustainable.
manufactured boards
Boards made by binding natural timber fibres or thin layers together.
synthetic polymers
Synthetic material mostly made from oil – usually called plastic.
thermosetting polymer
a polymer (plastic) that cannot be reshaped by heating – non-recyclable.
thermoforming polymer
Polymers/plastics that can be reshaped by the application of heat – can be recycled into other products.
acrylic
A type of plastic made from acrylic acid.
ferrous metals
Metals that contain iron & are magnetic.
non- ferrous
Metals that do not contain iron & are not magnetic.
alloys
Metals that contain two or more elements.
corrosion
The deterioration of a metal due to its environment.
board
Thick paper or layers of paper more than 220gsm.
Corrugated card
Two or more layers of fluted paper sandwiched between two paper liners. Used as protective packaging due to its impact resistance.
fabrics
A flexible material constructed from fibres.
synthetic fibres
Artificially made fibres.
natural fibres
Fibres from plant (such as cotton) or animal (such as wool) sources.
woven
A fabric constructed by yarns running vertically and horizontally.
knitted
Fabrics that are constructed by looping the yarns together.
non-woven
Fabrics constructed by bonding staple fibres together.
composite
A material made of different materials bonded together. Adding other materials to a timber product can improve its properties.
fibreglass - GRP
A composite used to make a strong, hardwearing, waterproof shell around a wooden beam,
plywood
A manufactured board made up of veneers bonded with glue to produce a flat sheet
smart materials
Materials that react with an external stimuli such as temperature, light, sound or movement
modern materials
Manmade materials that have been developed to improve their properties
technical textiles
Textiles that have been developed for their function rather than appearance.
