other materials Flashcards
name 3 types of hardwood
oak, birch, ash
name 3 types of softwood
pine, larch, spruce
is balsa a softwood or hardwood?
balsa is a hardwood even though it is incredibly soft
what is the difference between hardwood and softwood?
hardwood trees are deciduous (drop their leaves) and softwood trees are coniferous (evergreen)
name 3 types of manufactured board
MDF (medium density fibreboard), plywood, chipboard
what is a ferrous metal?
a metal that contains iron
name 3 types of non ferrous metal
aluminium, copper, tin
name 3 types of ferrous metal
cast iron, low carbon steel, high carbon steel
name 2 types of alloy and their components
brass (copper and zinc)
stainless steel (iron, chromium, small amount of carbon)
what is the difference between thermosetting snd thermoforming polymers?
thermosetting plastics cannot be softened by heat, but thermoformic plastics (also called thermoplastics) can be softened and reshaped by heat
name three types of thermosetting plastic
epoxy resin, polyester resin, urea formaldehyde
name three types of thermoforming plastic
PET (got a long ass shitty name i cba to type it out)
HDPE (high density polyethylene)
PVC (polyvinylchloride)
name 3 types of natural fibre
cotton, wool, silk
name 3 types of synthetic fibre
nylon (polyamide), polyester, elastane (lycra)
define smart material
a material that can change a property in response to a certain external stimulus, the change is reversible if the stimulus changes
