The newest 5 of 5 written questions. Open one to see it on the real paper.
Iron melts at a temperature of 1538 °C. Suggest why the car engine must be cooled by a flow of cold water.
See it on the paper →Aluminium is used to make cooking pans. Suggest why lithium is not used to make cooking pans.
See it on the paper →Recycling aluminium is cheaper than producing it from its ore. Suggest one other reason why aluminium is recycled.
See it on the paper →Recycling metals uses less energy and costs less than extracting metals from their ores. Suggest one other reason why metals are recycled.
See it on the paper →State what is meant by the term alloy.
See it on the paper →Most candidates could see the connection between the melting point of iron and the very high temperature of the petrol burning. They concluded correctly that the iron in the engine would melt if it was not cooled down.
— Examiner report, May/June 2025, 0653/31 Q8(a)(i) (Cambridge)
Most candidates gained credit by using their knowledge of Group l metals and information given in the question. Uncreditworthy answers included references to the lithium exploding, and that lithium is a poor conductor of heat.
— Examiner report, February/March 2024, 0653/32 Q2(e) (Cambridge)
Generally, candidates found this question challenging. A few responses referred to the finite supply of metals and gained credit. Responses that were not awarded credit included vague references to recycling being better for the environment, descriptions of the practical advantages of recycling and the fact that it is cheaper. The question indicated that cost should be excluded from the answer, so...
— Examiner report, February/March 2024, 0653/32 Q2(f) (Cambridge)
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