making cars Flashcards
what is most likely used to make cars?
steel or aluminium
what is aluminium normally used to make on a car?
the body
what is bad about steel
it rusts
what does iron need to rust
oxygen and water
what is bad about rusting on iron?
the rust flakes off which allows more rust to happen
what is addition of oxygen called
oxidation
what is reaction of oxygen called?
oxidation
what is good about aluminium
it does not corrode when there is water or oxygen present
what is rusting?
a chemical reaction between iron, oxygen and water
what is the chemical name for rusting?
hydrated iron oxide
what is the word equation for rusting?
iron+water+oxygen–rust
what is any reaction with oxygen called?
oxidation
what is also an increase of rusting?
acid rain and salt water
how does aluminium protect itself from rust?
a protective oxide layer forms on the surface which prevents rusting
how is this also relevant to iron?
rust is also an oxide layer, however it doesn’t protect the iron. It flakes off
what is the pH of acid rain?
lower than 3
what conditions does rust normally work best in?`
moist air
what is needed for corrosion?
oxygen
name 4 materials that are used when making a car
metals and alloys (copper, steel…)
plastics
glass
fibres
what does it mean when a material is malleable
it can be beaten into a thin sheet
name 3 features of both aluminium and iron
aluminium- no obvious corrosion 2.7 density malleable good electrical conductor iron- rusts rapidly 7.9 density malleable good conductor attracted to magnet
what is the difference between iron and steel?
steel doesent rust as easily and is harder
why is it easy to separate iron from aluminium?
because aluminium is not magnetic
what is good about recycling iron and aluminium?
it takes enormous amounts of energy to extract them from their ores
it avoids environmental damage due to mining and quarrying
it reduces rubbish going into landfill
name 3 properties that aluminium has and steel doesent and vice versa
steel is stronger and harder aluminium is malleable aluminium does not corrode easily alu is less dense steel is cheaper
how does recycling benefit us?
it is cheaper. It saves us money and energy. Less non-biodegradable waste being disposed of. Reduced dumping of toxic chemicals
