Section 2 Flashcards
Define strength
The ability to withstand forces like compression without breaking
Define hardness
The ability to withstand scratching, abrasion or denting
Define toughness
How hard a material is to break or snap
Define elasticity
How well a material can, stretch and bend and then return to its original shape
Define ductility
Ductile materials can be drawn into a wire
Define malleablity
The ability for materials to be bent or shaped
What are examples of working properties of materials?
-Ductility
-Malleability
-Hardness
-Toughness
-Strength
-Elasticity
What are some examples of physical properties in materials?
-Electrical conductivity
-Thermal conductivity
-Fusability
-Density
-Absorbency
Define electrical conductivity
Electrical conductors allow electricity to travel through them
What are some examples of materials with good electrical conductivity?
-Electrical wires
-Metals
-Fabrics can be coated/blended with metal
What are examples of insulators?
Plastics
Define thermal conductivity
Thermal conductors let heat travel through them easily
Define an electrical insulator
A material that doesn’t let electricity travel through it
Define a thermal insulator
A material that doesn’t let heat travel through it
What are examples of thermal conductors?
-Metals
-Pans (metal)
What are some examples of thermal insulators?
-Plastic
-Board
-Wood
Define fusability
Materials with a high fusibility have a low melting point
What is an example of a material with a high fusibility?
Solder
Define density
The density of a material is a measure of its mass per unit volume
Define absorbency
Materials that are absorbent are good at soaking up moisture
What is an example of an absorbent material?
Paper towels
Natural fibres (wool and cotton)
What are properties of absorbent materials?
-Dyed easily
-Vulnerable to stains
-Dry slower
What is an example of a material that is non absorbent?
Synthetic fibres like polyester
What are the properties of non metals compared to metals?
-More brittle
-Not always solid at room temperature
-Poor electrical conductors
-Dull looking
-Less dense