1. WALT Assess our knowledge
Ways of preventing rust

2. · Coat with oil or grease Bicycle chain
Ways of preventing rust
 Method
Example
·        Coat with oil or grease
Bicycle chain
·        Coat with layers of paint
Car body
·        Coat with plastic
Mesh fence
·        Galvanize with zinc
Nail
·        Alloy with other metals
Stainless steel cutlery
·        Electroplate with another metal
Jewellery
·        Use sacrificial protection
 Ship’s hull

3. Ways to prevent rusting
The chemical name for rust is___________
Another name for rusting is____________
Acids are pH ___ to ___
Some uses of everyday acids are: -
Alkalis are pH___ to ___
Some uses of everyday alkalis are:
A of pH 7 means that a substance is ________ an example of this is water.
When you add an acid to an alkali until it turns neutral this is called _____________.
The general equation for this is..
Acid +alkali  ________ + __________
Ways to prevent rusting
Keywords- What do these words mean?
Acid
Alkali
Exothermic
Chemical reaction
Neutralisation
Physical change
Combustion
Neutral
pH scale
Product
Reactant
Chemical Reactions
Revision!
Fire- what do you need to start a fire? Draw a fire triangle below:
What is the most reactive part of air?
Fuel + oxygen carbon dioxide + water
How do you test for each of the products:
Carbon dioxide?
Water?
Chemical Reactions
2 examples of physical changes are: -
2 examples of a chemical reaction is:
What are 3 signs of a chemical reaction?