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This lesson describes how feeding relationships with a community can be represented by food chains. The PowerPoint and accompanying resources are part of the 1st lesson in a series of 2 lessons, which have been designed to cover the content of the point 7.2.1 of the AQA GCSE biology and combined science specifications. The lesson also challenges knowledge from

The lesson begins by challenging the students to recognise the connection between the key terms producer, herbivores and carnivores. This task reminds students about food chains and that these diagrams begin with a producer, who photosynthesise. At this point, students are challenged with 5 multiple-choice questions about photosynthesis which was covered in topic 4 and the answers are embedded into the PowerPoint to assess their understanding. Moving forwards, a quick quiz is used to introduce the term, biomass, and students will construct food chains to show how this biomass is transferred between organisms via trophic levels. Students will learn that the organisms in the food chain can be categorised based on their nutrition, or by position, as they learn that producers are eaten by primary consumers, who are eaten by secondary consumers.

The remainder of the lesson considers prey-predator cycles and challenges students to explain how the numbers of these organisms rises and falls in cycles.

The second lesson in this series of lessons is also uploaded and covers the distribution and abundance in an ecosystem and is titled “Sampling within an ecosystem”.