Lab Report 8 PDF

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Lab Report for Introduction to Microscopy Name: Whitney Brooks Partners: None Lab Date: 11, July 2021 Submission Date: 13, July 2021, 2:20 pm. Lab Questions and Answers Discussion Questions: 1. Describe how you can quantify the size difference between the tick and the mite using the microscope. A: You can quantify the difference between a tick and a mite under a microscope by using the same power or magnification while observing both samples. 2. Why must specimens viewed with a compound microscope be thin or chemically cleared? A: Specimens under a microscope must be thin or clear so that light can pass through them. 3. Why are specimens viewed with a compound microscope sometimes stained with dyes? A: Specimens under a microscope stained with dyes so that they can be seen more clearly under the microscope. 4. What are the advantages and disadvantages of using a compound microscope versus a stereoscope? A: The advantages is you can see smaller objects, microscopic water life, and single celled microorganisms. The disadvantages are not as clear as a 3D image as a stereoscope and can only see individual one celled organisms. 5. Why is it important to adjust the light intensity when viewing a specimen with a compound microscope? A: It’s important in adjusting the light intensity when viewing a specimen because it improves viewing quality and minimizes eyestrain. 6. How can depth of field affect your ability to find and examine a specimen? A: The depth of the field can affect you finding a specimen because it has to see how much can be observed under a microscope. Laboratory Questions: 1. What are the magnification powers of the objective lenses on the microscope you are using? A: The magnification power of the objective lenses is compounded by the eyepiece lenses to obtain higher magnification. 2. What happens when you adjust the iris diaphragm of the microscope? A: When you adjust the iris diaphragm changes the amount of light that passes through the specimen being viewed.

3. When the slide was moved left, which direction did the “e” on the microscope slide appear to move? When the slide was moved away from you, which direction did the “e” appear to move? A: When I moved the slide “e” to the left it moved to the right. When I moved the slide away from me it moved towards me. 4. Can you use the fine adjustment knob so that you can focus on all three threads simultaneously when viewing them under high power? Why or why not? A: You can use the fine adjustment knob because if you use the other knob then the specimen can be easily broken in your slide. 5. Cork can float on water. As you examine cork under the microscope, what features do you observe that might account for this characteristic? A: The cork can float on water because it has less density in water. It weighs less than the amount of water and cork is made of bark from a tree. 6. Identify as many materials as you can in the dust. If you cannot identify a particular material, take a guess at what it might be. A: When I looked in the microscope I saw what looked like a piece of eyelash hair, pieces of dust, and maybe pet hair. Pre-laboratory Questions: 1. What is the magnification of the eyepiece lens on your microscope? A: The magnification of the eyepiece was at 10x power. 2. What is the magnification of the lowest power objective lens on your microscope? A: The lowest magnification power of the objective lens is 4x power. 3. Calculate the total magnification of an object viewed under the lowest power objective on your microscope. A: The total magnification under the lowest power objective on the microscope was 40x. 4. Describe the proper way to carry a microscope. A: To proper way to carry a microscope is by using your two hands. To place one hand on the microscope arm and the other hand under the microscope base. 5. Describe the proper way to store a microscope slide. A: They should be stored in a dry place at constant room temperature. They should be placed in a hard-sided container or box....