However, it is interesting when students can identify organisims in their samples. Return to top of the page. A picture key of algae, protozoans, rotifers, and worms should be available to help students identify what they see. Students are required to make observations and diagrams, and keep notes, including the size of the different organisms in the city. The conclusion of the lab allows the student to answer questions based on the interactions they observed.
Instructions Make wet mounts of the living culture.
Put one drop of culture on slide. This is usually sufficient unless specified differently. Squeeze the bulb of the gel's pipette firmly before inserting into culture. Observe the drop of pond water under low power to scan and find the organisms. High power is useful once you have found something to observe in more detail.