Over the next ten weeks you are expected to accumulate twenty careful drawings with approximate sizes representing ten of the organisms listed on the right. Each week you will draw one circle that captures the general population that seems to be present that week, and you will draw at least one circle with a careful drawing of a single organism. You will take notes each week on what you observe, including the date, the time, and where you got the sample (which bottle and whether bottom, top, in straw, scum, algae etc...).

Use a petri dish to draw circles in your lab notebook.

These circles represent your "field of view."

Have a look at a tiny piece of wet straw and draw it at 50x magnification, 100x magnification, and 400x magnification.
50x
  1. An Amoeba
  2. A Protozoan w/flagellum
  3. Three protozoans with cilia
    • Colpidium
    • Euplodes
    • Paramecium
  4. A Rotifer
  5. A Nematode
  6. A Tardigrade
  7. An insect larvum
  8. A crustacean larvum
  9. A crustacean adult
  10. A Single-celled green alga
  11. A Multicellular green alga
  12. A Diatom
  13. Volvox
  14. A bacterium
  15. Euglena
  16. A fungus
     
  

Micro-organisms in the Macrocosm Prentice-Hall Inc.