Name:________________________________________________ Per ____________

Activity: Observing Bacteria

Bacteria shapes vary with species. In this lab you will look at a variety of bacteria and observe the variety of shapes.

Part 1 Observing prepared slides of Bacteria

Materials

         Light microscope

         5 different prepared slides of bacteria

Procedure:

        Observe 5 different species of bacteria under 400X. Sketch each bacteria on your worksheet and make observations. After making you observations answer the questions below:

Questions:

        What similarities did you observe?

        How are they different?

        What different shapes did you observe?

Text Box: Power:

Species:

Observations:

 

 

 

 

Text Box: Power:

Species:

Observations:

 

 

 

 

Text Box: Power:

Species:

Observations:

 

 

 

 

 

 

 

 

Text Box: Power:

Species:

Observations:

 

 

 

 

 

 

Text Box: Power:

Species:

Observations:

 

 

 

 

 

 

 

Part 2 Observing bacteria cultures in Yogurt

Materials:

         Plain yogurt with active cultures

         Light microscope

         Slides, cover slips

         Distilled water

         Dropper

Procedure:

         Make sure your slides and cover slips are clean.

         Prepare a slide of the yogurt. You only need a little bit of yogurt.

         Under low power, find a section where the yogurt is pretty thin; this is where you will find the bacteria.

         Switch to high power (400X for most microscopes) for a better view of the bacteria.

         Make a sketch of your view under different magnifications.

Questions:

         How many different kinds of bacteria could you find?

         What other foods have bacteria living in them?

 

Text Box: Power:

Species:

Observations:

 

 

 

Text Box: Power:

Species:

Observations:
Text Box: Power:

Species:

Observations: