Water purifying exercise

The Baltic sea is one of the most polluted seas in the world. We about the state of the Baltic sea and thought about polluted water. The students got to purify dirty rainwater in their own purifying machines that they built out of old plastic bottles and materials from the nature.

Purifying dirty rainwater

Some groups got much more clearer water after they poured the dirty water through the purifying bottle

Here is a picture of the clearest water that the groups got after purifying the dirty water