stored energy - State the meaning of fuel, When fuel burns - State the meaning of combustion, oxygen, heat, fuel - Fire triangle, What are the 3 side?, temperature, duration, type of fuel, - Identify the variables that need to be controlled in an experiment., hydrogen - What’s the fuel used in a fuel cell?, Limewater turns milky or cloudy white - Tests for carbon dioxide and water., When oxygen reacts with a substance - What is oxidation?, Metal + oxygen =metal oxide - Describe the reaction of metal with oxygen., control fuel, control oxygen, measure time to burn - Plan ways to control variables in an experiment., carbon dioxide, soot - Pollutants formed by fossil fuel, results in acidic or neutral oxides - Reaction of non metal with oxygen, the Earths atmosphere keeps the surface warm, if the surface gets too hot this leads to climate change - State the meaning of greenhouse effect, global warming and climate change, It stays the same. - What happens to mass in a chemical reaction ?, The mass of a substance combines the mass of oxygen to produce a new substance: zinc plus oxygen =zinc oxide - Explain changes in mass seen in reactions ?, Water extinguisher removes heat, powder and carbon dioxide extinguishers exclude oxygen, foam extinguishers remove heat and exclude oxygen - Why do different types of fire, Extinguisher without water, because water sinks through oil - What do oil fires need ?, When energy is given out or taken in. - What is meant by exothermic change?, The rain dissolves sulphur dioxide and nitrogen oxides from the air - Explain how sulfur dioxide and nitrogen cause acid rain?,

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