WALT Assess our knowledge Ways of preventing rust

· 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

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?