Reference to past questions that indicate success 4.10.3.1 Corrosion is the destruction Describe experiments 2 Define the following terms Investigate the conditions for Video clips: of materials by chemical and interpret results to using suitable examples: rusting of iron nails in test reactions with substances in show that both air and tubes. the environment. Rusting is are necessary for corrosion an example of corrosion. rusting. rusting Both air and water are sacrificial protection. YouTube: necessary for iron to rust. Explain sacrificial protection in terms of Describe how to prevent Corrosion can be prevented relative reactivity. corrosion using the by applying a coating that examples: acts as a barrier, such as WS 2.2, 2.7, 3.5 greasing, painting or oxide coating on electroplating. Aluminium has aluminium an oxide coating that protects zinc on iron the metal from further magnesium on steel. corrosion. Use suitable examples to Some coatings are reactive explain why corrosion can and contain a more reactive be prevented using barriers metal to provide sacrificial and the role of sacrificial protection, eg zinc is used to barriers if appropriate to the galvanise iron.. example used. 4.10.3.2 Most metals in everyday use Recall a use of each of 1 Define the terms: Research the first alloy to Video clips: are alloys. the alloys specified include the history of it and alloy its uses. Bronze is an alloy of copper Interpret and evaluate high carbon steel and tin. Brass is an alloy of the composition and low carbon steel. an alloy using different copper and zinc. uses of alloys other than size marbles. Use this those specified, given Using diagrams, describe model to discuss the Gold used as jewellery is appropriate information. the difference between properties of alloys. usually an alloy with silver, metals and their alloys. copper and zinc. The MS 1a, 1c Describe the composition of Research the composition proportion of gold in the alloy common alloys and their and uses of alloys. Use this is measured in carats, with uses.
Reference to past questions that indicate success 4.10.3.1 Corrosion is the destruction of materials by chemical reactions with substances in the environment. Rusting is an example of corrosion. Both air and water are necessary for iron to rust. Corrosion can be prevented by applying a coating that acts as a barrier, such as greasing, painting or electroplating. Aluminium has an oxide coating that protects the metal from further corrosion. Some coatings are reactive and contain a more reactive metal to provide sacrificial protection, eg zinc is used to galvanise iron.. Describe experiments and interpret results to show that both air and are necessary for rusting. Explain sacrificial protection in terms of relative reactivity. WS 2.2, 2.7, 3.5 2 Define the following terms using suitable examples: corrosion rusting sacrificial protection. Describe how to prevent corrosion using the examples: oxide coating on aluminium zinc on iron magnesium on steel. Use suitable examples to explain why corrosion can be prevented using barriers and the role of sacrificial barriers if appropriate to the example used. Investigate the conditions for rusting of iron nails in test tubes. Video clips: YouTube: 4.10.3.2 Most metals in everyday use are alloys. Bronze is an alloy of copper and tin. Brass is an alloy of copper and zinc. Gold used as jewellery is usually an alloy with silver, copper and zinc. The proportion of gold in the alloy is measured in carats, with Recall a use of each of the alloys specified Interpret and evaluate the composition and uses of alloys other than those specified, given appropriate information. MS 1a, 1c 1 Define the terms: alloy high carbon steel low carbon steel. Using diagrams, describe the difference between metals and their alloys. Describe the composition of common alloys and their uses. Research the first alloy to include the history of it and its uses. an alloy using different size marbles. Use this model to discuss the properties of alloys. Research the composition and uses of alloys. Use this Video clips:
AQA-8462-SOW-RES.DOCX