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Converting Between Units | Biology for GCSE/IGCSE - Year 11 PDF Download

Converting Between Units: Extended

  • The table below shows how millimetres are related to two other measures of length.
  • What this essentially means is that 1mm = 1000µm and 1cm = 10,000µm.
  • This scenario often arises in questions involving disparate units, necessitating the conversion of both units into a common standard before performing calculations.
  • For example:

Converting Between Units | Biology for GCSE/IGCSE - Year 11
Converting Between Units | Biology for GCSE/IGCSE - Year 11

  • Remember 1mm = 1000µm
  • 2000 / 1000 = 2 so the actual thickness of the leaf is 2mm and the drawing thickness is 50mm
  • Magnification = image size / actual size = 50 / 2 = 25
  • So the magnification is x 25 (NO UNITS)

Question for Converting Between Units
Try yourself:
What is the equivalent length in millimeters of 5000 micrometers?
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