Biology A (Salters-Nuffield) A-Level
Control variables
What Control variables means in Biology A (Salters-Nuffield) A-Level, as defined for Pearson Edexcel.
Definition of Control variables
Check what you remember
Read the wording for your board, then hide it and explain Control variables in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: Pearson Edexcel
Include pH, substrate concentration, enzyme concentration, volumes and time intervals, so that temperature is the only factor affecting rate.
Topics that use Control variables
- Topic 5: On the Wild Side (Pearson Edexcel A-Level)
Related terms
- Abiotic factors
- Abundance
- Allele frequency
- Allopatric speciation
- Anthropogenic causes of climate change
- ATP as universal energy currency
- Biomass units
- Biotic factors
Using Control variables in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
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