Pond Scum: Investigating Microorganisms


Little else can stimulate a student’s interest in biology like a drop of pond water teaming with invisible life viewed with a microscope. This activity describes two means of observing pond water other than the traditional hanging drop or temporary wet mount slide preparation.

Intended Audience

K-4 X
5-8 X
9-12 X


Learning Objectives

By completing this activity, the student will be able to:

  1. Appreciate (acknowledge) the previously unseen life in pond water.
  2. Prepare a biofilm slide.
  3. Draw and describe a microorganism. 

Necessary Student Background

Students must be familiar with the workings of a microscope.


Aquatic, Environment, Protozoa, Biofilm, Water quality, Classification

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Pond Scum: Investigating Microorganisms (12 pages)