Ecosystems and Material Cycles
Every specification point for Ecosystems and Material Cycles, each with a free video lesson and notes — plus a quick quiz and flashcards to test yourself.
Specification points
9.1 Levels of Organisation
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Free9.10 Maintaining Biodiversity
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Free9.11B Food Security
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Free9.12 Material Cycles
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Free9.13 Carbon Cycle
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Free9.14 Water Cycle
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Free9.15 Nitrates
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Free9.16B Indicator Species
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Free9.17B Rate of Decomposition
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Free9.18B Composting
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Free9.19B Rate Changes in Decay
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Free9.2 Abiotic and Biotic
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Free9.3 Interdependence
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Free9.4 Parasitism and Mutualism
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Free9.5 Core Practical
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Free9.7B Transfer of Biomass
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Free9.8B Efficiency of Energy Transfers
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Free9.9 Human Interactions
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