Biology A-Level
Measurement of specimen size
What Measurement of specimen size means in Biology A-Level, as defined for OCR.
Definition of Measurement of specimen size
Check what you remember
Read the wording for your board, then hide it and explain Measurement of specimen size in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
Measurements are taken by counting graticule divisions across the specimen and multiplying by the calibration factor, giving a real size in micrometres.
Topics that use Measurement of specimen size
- Use of apparatus and techniques (OCR A-Level)
Related terms
- Accuracy of observation transferred to paper
- Accurate reading of scales and menisci
- Annotation as recorded evidence
- Apparatus selection
- Calibration of the eyepiece graticule
- Clarity and convention in biological drawing
- Colorimetry and calibration
- Computer modelling
Using Measurement of specimen size in the exam
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