GreatScopes Microscopes    

View Cart

Experiments & Labs Lab Journal Parts & Glossary Bookstore Links
 Home

 Teach Me:

How to buy the
Right Microscope


 Current Section:
Resources
Experiments
Lab Journal
Glossary
Bookstore
Links

 Other Sections:
Medical/Lab
School / Hobby
Stereo / Inspect
Industrial
Photo / Video
Buyer's Info
Contact Us

Click HERE for list of all Experiments

Activity: Observing Bacteria Cultures in Yogurt

Materials:

  • Plain yogurt with active cultures

  • Light microscope

  • Slides, coverslips

  • Distilled water

  • Dropper

Procedure:

  • Clean your slides and coverslips for dust and other particles.

  • Place a very small portion of plain yogurt onto the slide, and add one drop of water. Place the coverslip on top.

  • 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. If you have a microscope with an oil immersion lens, it will give you an even better view of these small organisms.

  • 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?

Author:

High School Senior from Fairfax, VA


Click HERE for list of all Experiments
Brought to you by GreatScopes and this FINE sponsor:

Microscope Books at prices you won't believe:

010

Go to: TOP | HOME

Contact GreatScopes
.

Copyright © 1996-2014 by GreatScopes, all rights reserved.
The contents of this site, text, graphics, and computer code inclusive, are protected by copyright laws worldwide, and may not be copied, reprinted, published, or distributed by any means without explicit permission of the copyright holder.