Quiz

• How many meters are in one kilometer?

  1000 m
• How many centimeters are in one meter?

  100 cm
• How many millimeters are in one centimeter?

  10 mm
• How many micrometers are in one millimeter?

  1000 µm
• How many nanometers are in one micrometer?

  1000 nm
• What is the formula for magnification in microscopy?

  • Magnification (M) = Image size (I) / Actual size (A)
• If a cell has an image size of 1 mm under x40 magnification, what is the actual size of the cell?

  0.025 mm or 25 µm
• What is the standard form of 1 mm in meters?

  1 x 10⁻³ m
• What unit conversions are necessary before calculating magnification and actual size?

  Units must be converted to the same measurement system.
• If a cell has a measured length of 9 cm, how many micrometers is this?

  90,000 µm
• If the actual length of a cell is 9 µm and the image size is 90,000 µm, what is the magnification?

  x10,000
• If a cell has an image size of 4.5 cm and its actual length is 3 µm, what is the magnification?

  x15,000
• What is the magnification if a cell has an image size of 160 mm and an actual length of 80 µm?

  x2000
• If a cell has a magnification of x100 and an image size of 7.5 mm, what is its actual size?

  75 µm
• A bacterial cell has an image size of 80 mm with a magnification of x400. What is its actual size?

  200 µm
• If a viral particle has an image size of 2.5 µm and a magnification of 5000x, what is its actual size?

  0.0005 µm
• If the scale bar measures 76 µm in actual length, what is the magnification if the image size is measured in mm?

  75 µm