PPM: physical properties & materials Flashcards
state the physical properties of ceramic
poor conductor of heat, hard, brittle, does not corrode, has a high melting point, can be moulded into shapes
state the physical properties of metal
shiny, good conductor of electricity and heat, can be moulded into shapes, can be bent without breaking
state the physical properties of glass
transparent, poor conductor of heat and non-conductor of electricity, can be moulded into shapes, brittle, has a high melting point
state the physical properties of plastic
does not corrode, lightweight, has a low melting point, poor conductor of heat, non-conductor of plastic, can be moulded into shapes
state the physical properties of fibres
can be spun into threads and woven into fabrics, and able to absorb dyes. poor conductor of heat and non-conductor of electricity
define electrical conductivity
the measure of how easily an electric current flows through it
define thermal conductivity
the measure of how easily heat flows through it
define melting point
the temperature at which a substance changes from the solid state to the liquid state
define boiling point
the temperature at which a substance changes from the liquid state to the gaseous state
define strength
the ability of a material to support a heavy load without changing its shape permanently
define hardness
the ability of a material to withstand scratches
define flexibility
the ability of a material to bend without breaking, and return to its initial shape and size after bending
define density
the amount of matter an object has in proportion to its volume
