# Lesson Worksheet: Using Microscopes Biology

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
• B
• C
• D
• E

Q3:

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

Q4:

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?

Q5:

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

Q6:

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

Q7:

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

Q8:

Fill in the blanks: Magnification = size/ size.

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

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.