Biology

• Magnification


  How many times bigger the image is
• Calculating total magnification


  Eyepiece lens magnification x objective lens magnification
• Calculating magnification without knowing lens magnifications


  Magnification = image size / real size
• Both image and real size measurements should have the same units
• Rearranging the magnification formula


  Cover up the thing you're trying to find, the parts you can still use are the formula you need to use
• Estimating can help check if your answer is correct
• Standard form


  Writing very big or small numbers with a decimal and a power of 10
• Units and their standard form equivalents

  • Millimetre (mm) = 10^-3 m
  • Micrometre (μm) = 10^-6 m
  • Nanometre (nm) = 10^-9 m
  • Picometre (pm) = 10^-12 m