Science 8Name:______Class ______

Label the parts of the microscope using the names from the word bank below.

Video:

arm,base, body, coarse focus knob, diaphragm, fine focus knob, high power objective lens, light source (lamp),low power objective lens, medium power objective lens, ocular (eyepiece) lens, revolving turret (or nosepiece), stage

Write the name of each part of the microscope to match the descriptions below.

______This heavy support at the bottom of the microscope is also used for carrying the microscope.

______This moveable table or platformholdsthe slide with clips for viewing.

______Found in the base below the stage, it provides the light needed to see a specimen.

______This wheel-shaped device underneath the stagecontrols the amount of light passing through the specimen.

______This part holds the ocular lensthe correct distance from the objective lenses.

______This is the curved or angled barwhich holds the lenses above the stage and is also used for carrying the microscope.

______This revolving device is used to change the objective lenses.

______Select one of these lenses located above the stage to magnify the images of the specimen 4x, 10x or 40X.

______The upper lens closest to the eye also magnifiesthe image (normally 10x)

______This adjustment moves the stage a large amount as the first step in focusing (EXCEPT with the high power objective lens).

______This adjustment moves the stage a small amount for precision focusing to get a sharp image.

Rules for Carrying the Microscope Safely

  1. Remove the dust cover and leave it neatly to one side in the cabinet.
  2. Ensure the cord is safely wrapped around the microscope.
  3. Carry the microscope with TWO hands – one on the arm and one under the base.
  4. Place the microscope gently on the workbench, at least 10 cm from the edge, with the eyepiece toward you.

Get Ready to Use the Microscope

  1. Use the coarse focus to lower the stage as far as it will go.
  2. Turn the revolving turret to position the LOW power (4x) objective directly above the stage.
  3. Unwrap the power cord and plug it in.
  4. Turn on the lamp.

Putting the Microscope Away Safely

  1. Turn off the lamp.
  2. Use the coarse focus to lower the stage as far as it will go.
  3. Turn the revolving turret to position the LOW power (4x) objective directly above the stage.
  4. Unplug the microscope. (DO NOT PULL the cord – pull the thick end of the plug)
  5. Wrap the power cord around the cord clips or base.
  6. Carry the microscope with TWO hands – one on the arm and one under the base.
  7. Replace the dust cover.

How to make a Wet-mount Slide

  1. Get a clean slide and coverslip from your teacher.
  2. Place ONE drop of water in the middle of the slide. Don’t use too much or the water will run off the edge and make a mess!
  3. Place the edge of the cover slip on one side of the water drop.
  4. Slowly lower the cover slip on top of the drop.
  5. Place the slide on the stage and view it first with the LOW objective. Once you see the image clearly, you can rotate the nosepiece to view the slide with the HIGHER objectives.
  6. Do NOT USE coarse focus with higher objectives.
Rules for a Biological Drawing
  1. Use unlined paper.
  2. Always use a pencil.
  3. Draw clean unbroken lines to draw WHAT YOU SEE. (Think about proportions.)
  4. Use labels to identify features and colours. (DO NOT colour the diagram.)
  5. Label lines should be horizontal whenever possible. Never cross labeling lines.
  6. The title should be the common name of the organism. (Example: Wolf)
  7. If you use a scientific name write it under the picture.
  8. Give the size of the organism using a scale bar, or give microscope magnification.
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Not so good / More like this
(missing magnification!)