Monday, March 30, 2015

Closed ecological system

One of our little science projects with the children was to build a closed ecological system, which means that once it is set up, nothing goes in or out.
We took sand, some water plants and one (!) water snail, put all in a glass jar and closed the lid safely. We placed it on the window sill for enough sunlight over the radiator for good temperature.....
Actually we soon figured out that TinkyWinky, our snail, has a little companion.... At first we worried for overpopulation, but since it is still the two of them, we are quite sure, that they are of different race and the second snail, which the children named Little Tinky, came with the plants....
Anyway, I never would have anticipated the system to work so nicely...but it is running now for four or five weeks, the water is clear, the inhabitant seem busy and lively and the plants grown in a reasonable way :-)
Although TinkyWinky and Little Tinky live in their own world, they somehow belong to the family by now :-)

Btw: No need to worry, in case anything goes wrong, we have an evacuation plan for them....



0 Kommentare:

Post a Comment