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Combined Science
OCR GCSE Combined Science A
Community Level Systems
OCR GCSE Combined Science A · J250 · Topic B4
Community Level Systems
Paper 2
· 6 notes
Understand the critical role that microorganisms play in the continuous cycling of chemicals within ecosystems.
Analyze how biotic and abiotic factors interact in an ecosystem and evaluate their subsequent effects on biological communities.
B4.1
Ecosystems
B4.1a
Material Cycling in Ecosystems
B4.1b
Microorganisms in Material Cycling
B4.1c
Importance of Carbon and Water Cycles
B4.1d
Levels of Ecosystem Organisation
B4.1e
Effects of Abiotic and Biotic Factors
B4.1f
Interdependence and Competition
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