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Biology

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
How many microscopes should you lift at once?   One at a time.  
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How should you hold a microscope?   One hand on the arm and the other on the base.  
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Do not use your ____________ to clean the lenses, instead use _________ ___________.   Fingers, lens paper.  
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Always start on ____________ power.   Low.  
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Use the ___________ adjustment knob when on low power, then the _________ adjustment for better resolution.   Coarse, fine.  
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Why should you look at the microscope from the side when switching to high power?   To make sure the objective doesn't hit the slide.  
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True or False: Only use the coarse adjustment knob on high power.   False, fine adjustment knob.  
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Wet Mount Slide: 1. Place a ________ of water on the slide. 2. Place the __________ in the water. 3. Lower the cover slip on a -- degree angle to avoid ________ __________.   Drop, specimen, 45, air bubbles.  
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Magnification.   How an image is enlarged under the microscope.  
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Low power has ___________ magnification.   Lower.  
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High power has _____________ magnification.   Higher.  
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Total magnification formula.   Objective x eyepiece.  
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Resolution.   Amount of detail you can see of an image.  
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Field of view.   The diameter of light you see when looking through a microscope.  
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As magnification increases, the field of view ____________.   Decreases.  
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Low power has a _________ field of view.   Larger.  
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High power has a _____________ field of view.   Smaller.  
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True or False: Low power is darker.   False, brighter.  
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True or False: High power is darker.   True.  
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Depth of field.   The distance above the slide in which the object is in good focus.  
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Eyepiece/Ocular lens.   Magnifies/Enlarges the image. (10x)  
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Objective lens.   Enlarges the image. (10x/40x)  
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Body tube.   Holds the lenses.  
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Nose piece.   Rotates to change objective lens from one power to another.  
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Stage.   Platform on which the specimen is mounted for observation.  
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Clips.   Hold the slide in place.  
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Diaphragm.   Controls the light quantity passing through the specimen.  
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Arm.   Holds the tube and stage used for carrying the microscope.  
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Base.   Supports the microscope, used for carrying it.  
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Coarse adjustment knob.   Used for focusing of the low power objective.  
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Fine adjustment knob.   Used for final focusing of the low power objective and all focusing of the high power objective.  
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Light microscope.   A microscope that uses light to produce an enlarged view of an image.  
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Simple microscope.   Magnifying glass. (Single lens)  
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Compound microscope.   Two lenses, images are inverted and reversed.  
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Phase contrast microscope.   Allows the details within living specimens to be seen without staining.  
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Electron microscopes.   Can not observe living or thick specimens, uses beams of electrons to magnify images, used to view smallest cellular organelles.  
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Dissecting microscope.   Examines objects and small organisms, images appear in 3D, two eyepieces.  
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Ultracentrifuge.   Separates the parts of cells according to their different densities.  
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