1) What materials rust? a) All metals b) Iron only c) Iron and steel 2) What is required for rusting to happen? a) Oxygen and water b) water and salt c) oxygen water and salt 3) What conditions speed up the rate of rusting? a) Dry conditions b) salty water on the metal c) salt in dry air 4) what is oxidation? a) A reaction which removes oxygen b) A reaction which adds oxygen c) A reaction which produces water

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