Flashcards in C2d-Making Cars Deck (18)
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 good electrical conductors
Iron more dense
Iron more magnetic
Iron corrodes easily
Why is steel better than iron?
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?
Why is steel used in building cars?
Can be hammered into sheets and welded together
Why is aluminium used in building cars?
Used for parts of engine
Why is glass used in building cars?
Why are plastics used in building cars?
Internal coverings for doors
Cover electrical wires
Why are fibres used in building cars?
What are the advantages of recycling materials?
Saves natural resources
Reduces disposal problems
What are the disadvantages of recycling materials?
They have to be separated before they can be recycled
Why do laws say 95% of cars must be recyclable?
Save natural resources
Reduce landfill use