C2d-Making Cars Flashcards
What is oxidation?
The addition of oxygen or reaction of a substance with oxygen
What effect does salt water and acid rain have on rusting ?
It speeds up rusting
Why is rusting an oxidation reaction?
Iron reacts with oxygen forming an oxide
What is the word equation for rusting?
Iron + oxygen + water –> hydrated iron(III) oxide
Why doesn’t aluminium corrode when its wet?
Aluminium reacts quickly with oxygen in air
Forms aluminium oxide, a protective layer
Aluminium oxide sticks to aluminium and stops any further reaction taking place
What are the properties of iron and aluminium?
Both malleable Both good electrical conductors Iron more dense Iron more magnetic Iron corrodes easily
Why is steel better than iron?
Harder
Stronger
Less likely to corrode
What are the advantages of building car bodies out of aluminium?
Lighter - better fuel economy
Corrodes less - longer lifetime
What is a disadvantage of using aluminium?
Expensive
Why is steel used in building cars?
Strong
Can be hammered into sheets and welded together
Bodywork
Why is aluminium used in building cars?
Strong
low density
Used for parts of engine
Reduces weight
Why is glass used in building cars?
Transparent
Windscreens
Windows
Why are plastics used in building cars?
Light Hardwearing Electrical insulators Internal coverings for doors Dashboards Cover electrical wires
Why are fibres used in building cars?
Natural synthetic
Hard wearing
Seats
Floor
What are the advantages of recycling materials?
Saves natural resources
Reduces disposal problems
