Students write word and balanced equations for the complete combustion of fuels and the oxidation of metals, compare complete and incomplete combustion and explain the dangers of carbon monoxide. They use the fire triangle to explain how fires are put out, interpret a three-tube experiment to find the conditions needed for rusting, calculate the mass of oxygen gained when magnesium burns and evaluate methods of preventing corrosion.
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Curriculum: New Zealand Curriculum. We show specific outcome codes only where they have been verified against the official curriculum document.
Completed: Combustion, Rusting and Oxidation Reactions
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Year 10 students (typically ages 14–15) working on mixtures & chemical reactions. It is pitched at level 2 · standard.
Yes. The PDF includes a full answer sheet with model answers and success criteria where there is more than one good answer. You can also view the answers online.
About 45 minutes for 15 questions. Short, regular sessions work best: two or three a week beats one long one.
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Success TutoringWorksheetsYear 10 · Science · Mixtures & Chemical ReactionsName
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Oxidation means combining with oxygen. Count every atom when you balance an equation.
Combustion is a fast reaction between a fuel and oxygen that releases heat and light. It is a type of oxidation reaction (a reaction in which a substance combines with oxygen).
Complete combustion happens with plenty of oxygen: a hydrocarbon fuel produces carbon dioxide and water, with a clean blue flame. Incomplete combustion happens when oxygen is limited: it produces carbon monoxide, soot (carbon) and water, and a yellow, smoky flame.
A fire needs fuel, heat and oxygen (the fire triangle). Removing any one puts the fire out.
Many metals react with oxygen to form metal oxides: metal + oxygen → metal oxide. For example, magnesium burns with a bright white flame: 2Mg + O₂ → 2MgO.
Rusting is the slow oxidation of iron: iron + oxygen + water → hydrated iron(III) oxide (rust). Rust is flaky, so it falls away and exposes more iron underneath.
A student set up three test tubes, each with an iron nail, and left them for a week. Tube A: tap water open to the air. Tube B: boiled water with a layer of oil on top. Tube C: dry air with a drying agent (calcium chloride) and a stopper. Only the nail in tube A rusted.
Preview — the PDF contains the full resource and answer sheet.
Students describe the properties of acids and bases, use the pH scale to compare how acidic or basic substances are (including the tenfold…
Students classify reactions as exothermic or endothermic from temperature changes and everyday examples such as combustion, respiration,…
Worksheet · Year 9 · Mixtures & Chemical Reactions · Level 2 · Standard
Worksheet · Year 9 · Mixtures & Chemical Reactions · Level 2 · Standard
Worksheet · Year 11 · Mixtures & Chemical Reactions · Level 3 · Challenge
Worksheet · Year 11 · Mixtures & Chemical Reactions · Level 3 · Challenge
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