Labs 1-2
Lab quiz
1. Name the two shapes of bacteria seen in labs 1 & 2.
 Rods and spheres
2. Define working distance.
 The distance between the stage and the lens
3. What happens to working distance when magnification increases?
 The field of view shrinks
4. Name the 3 modifications to our microscopes.
 Has a mechanical stage
 Has an iris and diaphragm
 Has an inbuilt light source
5. What is the maximum magnification of our microscopes?
 1000
6. T or F: The term sphere can be applied to describe the shape of yeast.
 True
7. Describe how to correctly store a microscope.
 Disinfect and dust off the microscope
 Clean the lens with a lens paper
 Turn the lenses toward the stage
 Put the lenses to the lowest objective power
 Ensure the microscope is turned off
 Wrap the cord neatly
 Put a dust jacket on the microscope
 Store it on a secure place and a flat surface
8. Name the magnification of the ocular.
 Scanning
 Low
 Medium
 High
9. T or F: Our microscopes use reflected light as a light source.
 False
10. Name one thing you learned in labs 1 & 2.
 Be observant
 Take precaution and think safety
 Do not fool around.


Always clean up after yourself
Report an incident immediately
Bonus: T or F: All bacteria are prokaryotes.

True