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6. Which of these is not a limitation of electron microscopes?

  • Electron microscopes are expensive
  • They require a high degree of skill and training to use
  • Electron microscopes can be unreliable
  • Electron beams are deflected by molecules in the air, so samples have to be placed in a vacuum

7. Which is smaller, a micrometer or nanometer?

  • Nanometer
  • Micrometer

8. What is the formula for the actual size of a specimen under a microscope?

  • Image size/Magnification
  • Image Size x Magnification
  • Magnification/Image size

9. Why do you section a specimen before viewing it under a light microscope?

  • It allows you to view the specimen outside of a vacuum
  • It stops the material distorting when cutting it into thin sections
  • It allows you to distinguish certain features

10. What is the primary advantage of the SEM?

  • It produces 3D Images
  • It can have a magnification of x500,000
  • It gives an image with colour

11. Lead salts are used to scatter electrons when using a TEM or SEM, it creates contrast like a stain does with a light microscope

  • True
  • False

12. The resolution of the human eye is...

  • 100 micrometers
  • 0.1 micrometers
  • 10 micrometers
  • 1000 micrometers

13. In an SEM...

  • The electrons are bounced of the sample, producing an image
  • The electrons are directed through the sample, with electrons passes less easily through certain parts, producing an image

14. In a TEM...

  • The electrons are directed through the sample, with electrons passes less easily through certain parts, producing an image
  • The electrons are bounced of the sample, producing an image

15. In which order of lenses does light pass through a microscope?

  • Condenser, Objective, Eyepiece
  • Objective, Condenser, Eyepiece
  • Eyepiece, Objective, Condenser
  • Eyepiece, Condenser, Objective

16. What does TEM stand for?

  • Transmission electron micrograph
  • Transposal electron microscope
  • Transposal electron micrograph
  • Transmission electron microscope
  • Televised electron microscope

17. What does SEM stand for?

  • Scanning electron microscope
  • Surveying electron microscope
  • Scanning electron micrograph
  • Sweeping electron micrograph