I sure hope today was a day to never forget for my students. After weeks of planning and ordering and locating the right materials, my students assembled closed system fresh water aquatic ecosystems as part of our unit on ecosystems. I’ve been getting excited about this and I hope they are now, too.
Basically, the Bubbles of glass jars filled with the abiotic and biotic factors necessary for a balanced ecosystem. We added spring water, rocks, and left room for some air before introducing the living things. To add life to our projects we dropped in two types of water plants, some fresh water crustaceans, and a snail. Voilà, an ecosystem in a jar.
I had a great time watching everyone get excited about what we made. Some groups have even named their animals already! Anyways… Over the rest of our unit and hopefully the rest of the year, we will carefully observe our Bubbles for changes to the ecosystem. If we are lucky we will watch the different factors in the jar develop a complete life cycle together that never needs changing!