What gas is required for combustion?, Nitrogen, Oxygen, Hydrogren, What is another word for burning, Combustion , Freezing, Condensing , What forms when iron reacts with oxygen?, Rust, Ice, Plastic, What energy is released during combustion?, Cold air, Heat and light , Water, Which material below is a fuel?, Water, Wood, Sand, What type of reaction is combustion?, Chemical reaction, Mechanical reaction , Physical reaction .

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