controlled variables
What controlled variables means in Biology GCSE, as defined for OCR.
Definitions of controlled variables
Exam boards and our study guides word this term in slightly different ways. Learn the version your board uses.
Check what you remember
Read the wording for your board, then hide it and explain controlled variables in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
These include enzyme volume and concentration, substrate volume, temperature and pH, which are kept constant during the investigation.
Controlling variables such as water bath temperature or using an LED bulb to prevent heat transfer.
Topics that use controlled variables
- Photosynthesis (OCR GCSE)
- What happens in cells (and what do cells need)? (OCR GCSE)
Related terms
- compound measures
- denaturation
- active site
- Amino acid sequence
- axis scaling
- Biomass
- bubble counting
- Bunsen burner
Using controlled variables in the exam
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