The newest 5 of 5 written questions. Open one to see it on the real paper.
Circle two words in bold to give a correct description of an ecosystem. An ecosystem is a community of habitats / organisms and their
See it on the paper →Circle two words in bold to give a correct description of an ecosystem. An ecosystem is a community of habitats / organisms and their
See it on the paper →What is an ecosystem?
See it on the paper →Sewage containing high levels of nitrate gets into the pond. Explain why a high concentration of nitrate in the pond may result in the death of animals in the food chain.
See it on the paper →Farmers add fertilisers containing nitrate ions to their land. Some of these nitrate ions enter lakes. This can lead to eutrophication. Use words from the list to complete the flow diagram about eutrophication. Each word may be used once, more than once or not at all. consumers death decomposition increase decrease gro...
See it on the paper →Some stronger candidates were familiar with the sequence of events occurring during eutrophication. From those candidates attempting to describe these processes, two main approaches were seen. Some described the stimulation of plants/producers and consequences of this, and others started with the idea that excess nitrate would poison all animal life. The required approach was the former and candid...
— Examiner report, May/June 2022, 0653/43 Q7(b) (Cambridge)
Almost all of the candidates gained at least partial credit. There did not appear to be any particularly common mistakes although death was often written instead of growth, and consumers instead of producers.
— Examiner report, May/June 2019, 0653/43 Q4(b) (Cambridge)
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