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Fun Science - World in Pond Water

Updated on February 5, 2017

There is a Whole Word in just a Drop of Water

Explore microscopic life in a local pond, marsh, or stream. A cup of water can contain millions of microorganisms. Seeing tiny single celled organisms through a microscope really brings home to kids the concept of cells and the idea that there are living things too small to see with the naked eye.

Simple Way to Learn about Microscopic Organisms and Microscopes

Watching the tiny little creatures in a drop of water can be endlessly fascinating. So many tiny forms of life that humans never knew about before microscopes were invented only about 400 years ago.

What do you need?

Jar of Water - Take a jar to a local pond, marsh, or stream and fill it with water.

Microscope - A basic compound microscope is all you need.

Slides and Slide Covers- Most microscopes come with some blank slides or you can buy them separately. For this you will need well slides, these have a small dip in the center.

Eye Dropper - For dropping a tiny bit of water onto your slide.

For help using a microscope either look in your microscopes instruction guide or check one of the links under How to Use a Microscope Links.

Video on Using a Microscope

Identifying Microscopic Life

Common Microscopic Organisms


Protists are single celled eukaryotic microorganisms (eukaryotic cells are those with a nucleus). Protists used to all be classified as a Kingdom but more recently that classification has proven to be incorrect, scientists are still working out where various types of protists such as protozoa (animal-like), algae (plant-like), and fungus-like protists belong in the tree of life.

Flagellated Protozoa - These protozoa move using a flagellum, a long tail-like structure.

Amoebas - These protozoa move and capture food by changing their body shape, reaching out psudopods (meaning false feet).

Ciliates - These protozoa are covered with tiny hair-like structures call cilia, they move by "rowing" with the cilia.

Algae - Algae are plant-like single celled organism that sometimes live in groups. They produce their food using photosynthesis just like plants (in fact many forms of algae are sometimes classified as plants).

Diatoms - Diatoms are a very interesting class of single celled algae. They form hard, rigid, cell wall out of silica (the same stuff a lot of sand and glass is made from).


Crustaceans -The crustaceans are a large group of arthropods. Lobsters, crabs, shrimp, and barnacles are familiar crustaceans but many are also microscopic. Most crustaceans live in the water, either fresh water or salt water. They have segmented bodies and are the closest relatives of insects.

Worms - The name worm is used for many unrelated animals that evolved a slender elongated body shape.

Insect larva - Many insects lay their eggs in water, when they hatch these larva usually look nothing like the adult insects.

Rotifers - Rotifers are microscopic multicellular animals, and among the most ancient and primitive of all animals.


You are likely to see many tiny aquatic plants in your pond water, along with broken bits of larger plants such as leaves and roots, dependign on the time of year you many also see tiny seeds or pollen.


Bacteria are the oldest known forms of life and comprise their own Kingdom. Most are barely visible under a microscope but some are large enough to see.

Videos Through a Microscope

Lab Notes - Leave you comments, questions, etc.

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    • profile image

      InsasiaSic 2 years ago

      Wonderful web-site you have right here.

    • archangelptx profile image

      archangelptx 4 years ago

      A great resource for those starting off in the world of science! Plenty of experiment ideas and great equipment suggestion.

    • OUTFOXprevention1 profile image

      OUTFOXprevention1 5 years ago

      Great lens on microbes! Thanks for the share.

    • profile image

      ScienceDave 6 years ago

      A very nice lens! It took me way back in time. A microscope can be an amazing and fascinating passport into a wondrous world!

      Science Dave (aka Dave Briggs) :~)

    • profile image

      scotchtapefordays 6 years ago

      Isn't it amazing the things you can find living in water?

    • profile image

      ShamanicShift 7 years ago

      Interesting, instructive, engaging--great reference.

    • LabKittyDesign profile image

      LabKittyDesign 7 years ago

      This is perfect! To this day I can remember the time my dad brought home a microscope and a jar of pond water. I think the hours we spent looking at it together was probably the main reason I wound up getting a doctorate in biology.

    • labchef lm profile image

      labchef lm 8 years ago

      Excellent lens. Very good reference for students.

    • AndrewGreen LM profile image

      AndrewGreen LM 8 years ago

      I do explore pond life in my own pond. With this lens you have given me another way of looking at life within my pond. Great lens. Thank you.

    • Paula Atwell profile image

      Paula Atwell 9 years ago from Cleveland, OH

      This is great! Would be perfect for a report.

    • Paula Atwell profile image

      Paula Atwell 9 years ago from Cleveland, OH

      This is great! Would be perfect for a report.

    • Sheryl Westleigh profile image

      Sheryl Westleigh 9 years ago from Maine

      [in reply to Fisherman_Mike] That's the best compliment I could get for this lens. Thanks you.

    • profile image

      Fisherman_Mike 9 years ago

      Very nicley done ^5 had my daughter use it for a report in school. Very nice keep up the great work.

    • profile image

      Fisherman_Mike 9 years ago

      Very nicley done ^5 had my daughter use it for a report in school. Very nice keep up the great work.

    • rebeccahiatt profile image

      rebeccahiatt 9 years ago

      Very educational lens. Microscopic life is very interesting and most people never know it all exists.

    • profile image

      Joan4 9 years ago

      oh my! This is a great lens! I hope teachers find these super educational lenses! Great job!

    • profile image

      badmsm 9 years ago

      Yeah! This is great info for beginners. 5 stars!