Parts of the Microscope

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Introduction to the Microscope

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Presentation transcript:

Parts of the Microscope Students will have their microscopes out, for reference as we go through each of the steps. As an introduction, students will be asked what kinds of things they can do with this tool.

What is a microscope? A microscope is a type of lab equipment that magnifies the image of an object so that small details can be observed. The word “micro” means small. The word “scope” means to see or view

Magnified cells from plant root

Light Microscope Most common type used in schools Uses a compound lenses to magnify objects Compound lenses bend or refract light to make the object beneath them appear closer.

Microscope parts (pg. R14) Eyepiece Body Tube Nosepiece Arm Objective Lens Stage Stage Clips This is the exact version of the microscope used in class. Students will be identifying the parts on the microscopes at their desks as we go along and what their functions are. Coarse Focus Diaphragm Fine Focus Light Base

Microscope parts Eyepiece: allows you to see object on slide by 10 times its normal size Body tube: separates the lens in the eyepiece from the objective lens Nosepiece: holds the objective lenses This is the exact version of the microscope used in class. Students will be identifying the parts on the microscopes at their desks as we go along and what their functions are.

Microscope parts Objective lens: 40X (high power) magnifies to 400 times normal size, 10X (low power) magnifies to 100 times normal size; 4X (scanning power) magnifies to 40 times normal size Stage: supports the slide Diaphragm: used to control the amount of light passing through the lens This is the exact version of the microscope used in class. Students will be identifying the parts on the microscopes at their desks as we go along and what their functions are.

Microscope parts Coarse adjustment: knob used to move the stage up and down Fine adjustment: knob used to make to lens focused Arm: used to hold and support the body above the stage Stage clip: used to hold slide in place Base: bottom support of microscope This is the exact version of the microscope used in class. Students will be identifying the parts on the microscopes at their desks as we go along and what their functions are.

How to use microscope Always carry with 2 hands Hold the base and the arm Do not force knobs Always store covered Keep objects clear of desk and cords Teacher demonstrates how to hold the microscope, where the lens paper is located and how to use it. Students will be invited to turn the knobs and observe the stage as it moves up and down. Teacher will demonstrate how to store the microscope.

How to draw specimens 1. Always use pencil - you can erase and shade areas 2. All drawings should include clear and proper labels (and be large enough to view details). Drawings should be labeled with the specimen name and magnification.

How to draw specimens 3. Labels should be written on the outside of the circle. The circle indicates the viewing field as seen through the eyepiece, specimens should be drawn to scale . **if your specimen takes up the whole viewing field, make sure your drawing reflects that.

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Practice Labeling the Parts

Practice labeling the parts Body tube Nosepiece Scanning objective lens (4x) Low power objective lens (10x) High power objective lens (40x) Stage clips Diaphragm 8. Light 9. Eyepiece 10. Arm 11. Stage 12. Coarse Adjustment 13. Fine Adjustment 14. Base