Worksheet: Using Microscopes

In this worksheet, we will practice recalling how to use light microscopes, calculate magnification and compare different types of microscopes.

Q1:

Which of the following statements about light and electron microscopes is correct?

  • AElectron microscopes have a higher resolution and a higher magnification than light microscopes.
  • BElectron microscopes have a higher resolution but a lower magnification than light microscopes.
  • CLight microscopes have a higher magnification and higher resolution than electron microscopes.
  • DLight microscopes have a lower magnification but a higher resolution than electron microscopes.

Q2:

A red blood cell is viewed under a microscope as 4 mm wide. The actual width of the cell is 0.8 mm. What is the magnification of the image?

  • A×20
  • B×5
  • C×2
  • D×50
  • E×500

Q3:

Fill in the blanks: Magnification = size/ size.

  • Aimage, actual
  • Bactual, image
  • Cimage, magnification
  • Dactual, magnification

Q4:

If a bacteria cell is 9 micrometers wide, how wide is it in millimeters?

Q5:

If the eye of a flea is 0.001 millimeters wide, how wide is it in nanometers?

Q6:

The Ebola virus is 80 nm long. Under a microscope, it appears to be 1 mm long.

What is the length of the image of the virus in nanometers?

What is the magnification of this image?

  • A80x
  • B1,250x
  • C12,500x
  • D100x
  • E8x

Q7:

If a fungus is 2,000 micrometers long, how long is it in millimeters?

Q8:

A plant cell is viewed under a microscope. The diameter of the cell in the image produced is 25 mm. The image has been magnified 1,000x. What is the cell’s actual diameter?

Q9:

The diagram provided shows a light microscope.

Which of the following structures is represented by label 1?

  • AObjective lens
  • BEyepiece
  • CCoarse focus knob
  • DStage
  • ELight

Which of the following structures is represented by label 2?

  • ALight
  • BCoarse focus knob
  • CStage
  • DObjective lens
  • EEyepiece

Which of the following structures is represented by label 3?

  • AEyepiece
  • BObjective lens
  • CLight
  • DCoarse focus knob
  • EStage

Which of the following structures is represented by label 4?

  • AStage
  • BObjective lens
  • CStand
  • DLight
  • ECoarse focus knob

Q10:

A student views a plant cell underneath a microscope and produces a scientific drawing, shown here. What is incorrect about this scientific drawing?

  • AThey have colored in parts of the cell.
  • BThey could not have seen this structure with only 1,000x magnification.
  • CThey have not drawn the cell to scale.
  • DThey have labeled the cell incorrectly.

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