Biology A-Level
Units for rates
What Units for rates means in Biology A-Level, as defined for OCR.
Definition of Units for rates
Check what you remember
Read the wording for your board, then hide it and explain Units for rates in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
A rate combines two quantities, for example cm³ s⁻¹ for gas volume per second, keeping the time element in the denominator.
Topics that use Units for rates
- Implementing (OCR A-Level)
Related terms
- Apparatus selection matched to purpose
- Matching graph type to data type
- Table headings with quantity and unit
- Accurate measurement technique
- Axis labelling and linear scales
- Calibration and correct set-up
- Consistent precision in recorded data
- Controlling variables with appropriate equipment
Using Units for rates 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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