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28 Cards in this Set
- Front
- Back
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What was the simple microscope like?
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One lens like a magnifying glass
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Who made the first crude compound light microscope and between how much could you magnify with it?
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Janssen with a magnification between 3x and 9x
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What did Robert Hooke examine?
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Robert Hooke examined a piece of cork under a microscope
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What did Robert Hooke see on the tree he examined?
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He saw boxes and the boxes looked like "Little Rooms" like a prison or jail cells.
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What term did Robert Hooke coin?
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He coined the term cells.
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Who used a simple glass bead to magnify an image?
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Antonio Van Leeuwenhoek.
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What did Antonio Van Leeuwenhoek examine?
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a drop of pond water.
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What did Antonio see?
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He saw small organisms and called them animalcules or "little animals". He also was the first to see bacteria, blood cells, and sperm cells.
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What are the "Little animals" or animalcules called?
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Protozoans or Kingdom Protista
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What does an electron microscope do?
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-Uses a magnetic field to bend electrons.
-Let`s you magnify up to 1,000,000 and up times |
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What are two types of electron microscopes?
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-Scanning Electron Microscope
-Transmission Electron Microscope |
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Scans the surface (3-D Image)
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Scanning Electron Microscope (SEM)
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Used to study details of Internal cell structures (Flat Image)
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Transmission Electron Microscope
(TEM) |
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What is the total magnification of a compound light microscope?
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Eyepiece X Objective= Total Magnification
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Contains the magnifying lens you look through (ours is 10x)
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Eyepiece
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Maintains the proper distance between the eyepiece and the objective lenses. Connects the eyepiece to the objective lenses.
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Body Tube
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Supports the body tube and is used for carrying
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arm
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Focuses in large amounts under scanning and low power objective
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coarse adjustment
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Supports the microscope and is used for carrying
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Base
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Projects light upward through the diaphragm, the specimen and the lenses
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Light Source (Lamp/Mirror)
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Focuses slightly to sharpen the images (best used under high power)
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Fine Adjustment
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Regulates the amount of light that enters a specimen
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Diaphragm
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Supports the slide being viewed
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Stage
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Holds the slide in place
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Stage Clips
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Provides high magnification usually 40x
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High Power Objective
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Provides the 2nd least amount of magnification usually 10x
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Low Power Objective
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Lowest magnification used to find and center object. Usually 4x
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Scanning Objective
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Holds the objectives and can be rotated to change magnification
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Revolving Nosepiece
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