New Edexcel IGCSE 9-1 4BI1 syllabus for 2017 first examined in 2019
This is a PowerPoint presentation for the topic - Section 4b Feeding Relationships
4.6 understand the names given to different trophic levels, including producers, primary, secondary and tertiary consumers and decomposers
4.7 understand the concepts of food chains, food webs, pyramids of number, pyramids of biomass and pyramids of energy transfer
4.8 understand the transfer of substances and energy along a food chain
4.9 understand why only about 10% of energy is transferred from one trophic level to the next
The file is fully editable, has plenty of original diagrams and animations along with true false concept check questions at the end of the presentation and an exam style question.
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