Question 1

• What is a microscope?

• What does ‘microscopic’ mean?

• What is microscopy?

Question 2

State the three components of the cell theory.

Question 3

Distinguish between the following types of microscopes.

• A light microscope and an electron microscope.

• A compound microscope and a stereo microscope.

• A monocular microscope and a binocular microscope.

• A scanning electron microscope and a transmission electron microscope.

Question 4

Match the components A-J on the following diagram of a compound microscope with the correct labels from the word list below.

arm • base • coarse focus knob • eyepiece • fine focus knob • lamp • objective lens • stage • stage clips • stage controls

Question 5

Describe the function of the following parts of a compound microscope.

• Eyepiece (ocular lens)

• Objective lens

• Coarse focus knob

• Fine focus knob

• Stage

• Stage clips

• Stage controls

• Lamp

Question 6

Complete the following table.

Question 7

State the type of microscope used to produce the following images. (Select from the four types listed in Q6.)

Question 8

Complete the following table of magnification.

Question 9

The image below shows red blood cells viewed under a microscope.

• What length does the scale bar represent? (This is known as the ‘actual size’.)

• Measure the length of the scale bar (to the nearest mm) using your ruler. (This is known as the ‘image size’.)

• Convert your answer for (b) into μm. (1 mm = 1000 μm.)

• Calculate the magnification of the image using the formula below:

• Calculate the actual diameter of a red blood cell based on the arrow labelled with a question mark.