DT Year 9 Flashcards
(33 cards)
What is a specification?
List of requirements for a product that is decided at the design stage
How can you create and develop ideas?
Make a moodboard for inspiration, sketch iniital ideas, develop ideas on computer
What are ferrous metals?
Metals that contain iron, making them magnetic e.g. mild steel, stainless steel
What are non-ferrous metals?
Metals that don’t contain iron and aren’t magnetic e.g. aluminium, copper, brass
What are ferrous metals like mild steel used in and why?
Construction in columns and reinforcing bars because of their strength and affordability
What are ferrous metals like stainless steel used in and why?
Pans and cutlery because of their corrosion resistance and durability
What are non-ferrous metals like aluminium used in and why?
Aeroplanes and ladders because it’s strong, lightweight and corrosion resistive
What are non-ferrous metals like copper used in and why?
Pipes and electrical wiring because it is a good conductor and resistive to corrosion
What are non-ferrous metals like brass used in and why?
Door handles and electrical parts because it is strong and resisitant to corrosion
What is natural timber?
Wood directly sourced from trees without
What are the the 2 types of natural timber?
Harwood and softwood
What is hardwood?
Wood that comes from deciduous trees
Name 3 advantages of hardwood in comparison to softwood
It is denser, heavier and more durable than softwood
Name 3 advantages of softwood compared to
hardwood
It grows quicker, is more available and is cheaper
What is hardwood used in and why?
Its used in furniture, flooring and construction due to its strength and durability
What is softwood used in and why?
Construction, furniture and interior fittings because it is cheap and available
Name 3 types of hardwood
Oak, maple, walnut
Name 3 types of softwood
Pine, spruce, fir
What are thermoforming polymers?
Plastics that can be softened by heating, shaped into new form then hardened by cooling
Name 3 features of thermoforming polymers
Recyclable, reformable, lightweight
What are thermoforming polymers used in and why?
Packaging, car parts, electrical housings because they are reformable and lightweight
Name 3 types of thermoforming polymers
Acrylic(PMMA), polystyrene(PS), polyvinyl chloride(PVC)
What are thermosetting polymers?
Plastics that can be permanently hardened when heated and shaped
Name 3 features of thermosetting polymers
Permanent set shape, heat resistant, chemical and electricity resistant
