Biology GCSE
rate of decay
What rate of decay means in Biology GCSE, as defined for AQA, OCR.
Definitions of rate of decay
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Reference: AQA
Calculated by dividing the change in a measured quantity by the time taken, for example mass lost ÷ time or gas produced ÷ time.
Calculated by dividing the total change in observed mass or volume by the elapsed time.
Topics that use rate of decay
- Decomposition (biology only) (AQA GCSE)
- Ecosystems (OCR GCSE)
Related terms
- abiotic and biotic components
- abiotic factors
- aerobic and anaerobic decomposition
- Aerobic respiration and oxygen
- Anaerobic decay
- Appropriate scales
- Biogas generators
- biotic factors
Using rate of decay in the exam
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