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Name _________________________pd. _______

INTRODUCTION TO THE LIGHT MICROSCOPE

Introduction: You will be practicing how to use a microscope with the “virtual Microceope. The virtual microscope

is a little more complicated than the microscope we use in the lab, but it will not be difficult to use. Access the

virtual microscope at http://www.udel.edu/biology/ketcham/microscope/scope.html or through our class website

at www.sciencegreer.wikispaces.com – 7 th grade – websites - Microscopy Pre-lab Activities

1. Familiarize yourself with the microscope, run the tutorial and examine the parts you will be working

with.

a. How many objective lenses are on the virtual microscope?

b. What are the numbers listed on each of the objectives?

2. You will be looking at the slide (top right) labeled “letter e”. Follow the tutorial and use the

microscope adjustments to focus on the “e” on each of the objectives.

Draw the “e” exactly as it appears

Scanning (4) Low (10) High (100)

3. Which letter on the microscope points to the

a. Ocular lens _____

b. Coarse adjustment knob _______

c. Fine adjustment ______

d. Stage centering _______

4. Now view several microscope images of “common things”.

Go to www.biologycorner.com/microscope. After viewing the images, go to

the quiz. Write down the names of the specimens for each letter.

a. _______________________

b. _______________________

c. _______________________

d. _______________________

e. _______________________

f. _______________________

g. _______________________

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Bacteria

Look at the cheek slide and bacteria slide on all the powers. Draw a color picture on each setting.

4x 10x 40x

Cheek Smear

10x 40x