Transcript Microscope - Nashua School District

Microscopes
Parts
Functions
Usage
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Best behavior - expensive
Careful of lamp – hot
Read signs for directions
Some set up – fine focus only
Explore on own - low power & coarse
focus first
Eyepiece
Body Tube
Revolving Nosepiece
Objective Lens
Stage
Clips
Diaphragm
Light
Arm
Stage
Coarse Focus
Fine Focus
Base
• Adjust coarse focus until
stage is all the way down
• Place object on stage
• Click low power lens into
place
• Look into the eyepiece –
cover or close one eye
• Use the coarse focus until in
view, then fine focus for
detail to focus
• Follow steps to focus using low power
• Click the nosepiece to the next higher
power objective – middle, then high
• Do NOT use the coarse focus
• Use fine focus only in higher powers
• Use “pointer” to share findings
What can you find on your slide?
Images Produced by Light
Microscopes
Amoeba
Human cheek cells
Streptococcus bacteria Anthrax bacteria
Plant cells
Yeast cells
Images Produced by Electron
Microscopes
Cyanobacteria Lactobacillus Campylobacter Deinococcus
(TEM)
(SEM)
(SEM)
(SEM)
House ant
Avian influenza
virus
Human eyelash
Yeast
Using Microscopes to Visualize
the Three Shapes of Bacteria
Light microscope:
Spirilla (spiral)
Cocci (round)
Bacilli (rod)
Three shapes of bacteria
taken with an SEM